21306780

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{211}}^1$

素因数の和:257

約数の個数: 192

約数和(自身を含む): 76930560

約数和(自身を除く): 55623780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 17, 18, 20, 22, 27, 30, 33, 34, 36, 44, 45, 51, 54, 55, 60, 66, 68, 85, 90, 99, 102, 108, 110, 132, 135, 153, 165, 170, 180, 187, 198, 204, 211, 220, 255, 270, 297, 306, 330, 340, 374, 396, 422, 459, 495, 510, 540, 561, 594, 612, 633, 660, 748, 765, 844, 918, 935, 990, 1020, 1055, 1122, 1188, 1266, 1485, 1530, 1683, 1836, 1870, 1899, 1980, 2110, 2244, 2295, 2321, 2532, 2805, 2970, 3060, 3165, 3366, 3587, 3740, 3798, 4220, 4590, 4642, 5049, 5610, 5697, 5940, 6330, 6732, 6963, 7174, 7596, 8415, 9180, 9284, 9495, 10098, 10761, 11220, 11394, 11605, 12660, 13926, 14348, 16830, 17935, 18990, 20196, 20889, 21522, 22788, 23210, 25245, 27852, 28485, 32283, 33660, 34815, 35870, 37980, 39457, 41778, 43044, 46420, 50490, 53805, 56970, 62667, 64566, 69630, 71740, 78914, 83556, 96849, 100980, 104445, 107610, 113940, 118371, 125334, 129132, 139260, 157828, 161415, 193698, 197285, 208890, 215220, 236742, 250668, 313335, 322830, 355113, 387396, 394570, 417780, 473484, 484245, 591855, 626670, 645660, 710226, 789140, 968490, 1065339, 1183710, 1253340, 1420452, 1775565, 1936980, 2130678, 2367420, 3551130, 4261356, 5326695, 7102260, 10653390, 21306780]

約数ペア:

[(1, 21306780), (2, 10653390), (3, 7102260), (4, 5326695), (5, 4261356), (6, 3551130), (9, 2367420), (10, 2130678), (11, 1936980), (12, 1775565), (15, 1420452), (17, 1253340), (18, 1183710), (20, 1065339), (22, 968490), (27, 789140), (30, 710226), (33, 645660), (34, 626670), (36, 591855), (44, 484245), (45, 473484), (51, 417780), (54, 394570), (55, 387396), (60, 355113), (66, 322830), (68, 313335), (85, 250668), (90, 236742), (99, 215220), (102, 208890), (108, 197285), (110, 193698), (132, 161415), (135, 157828), (153, 139260), (165, 129132), (170, 125334), (180, 118371), (187, 113940), (198, 107610), (204, 104445), (211, 100980), (220, 96849), (255, 83556), (270, 78914), (297, 71740), (306, 69630), (330, 64566), (340, 62667), (374, 56970), (396, 53805), (422, 50490), (459, 46420), (495, 43044), (510, 41778), (540, 39457), (561, 37980), (594, 35870), (612, 34815), (633, 33660), (660, 32283), (748, 28485), (765, 27852), (844, 25245), (918, 23210), (935, 22788), (990, 21522), (1020, 20889), (1055, 20196), (1122, 18990), (1188, 17935), (1266, 16830), (1485, 14348), (1530, 13926), (1683, 12660), (1836, 11605), (1870, 11394), (1899, 11220), (1980, 10761), (2110, 10098), (2244, 9495), (2295, 9284), (2321, 9180), (2532, 8415), (2805, 7596), (2970, 7174), (3060, 6963), (3165, 6732), (3366, 6330), (3587, 5940), (3740, 5697), (3798, 5610), (4220, 5049), (4590, 4642)]