21409740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{983}}^1$

素因数の和:1020

約数の個数: 108

約数和(自身を含む): 71456112

約数和(自身を除く): 50046372

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 121, 132, 165, 180, 198, 220, 242, 330, 363, 396, 484, 495, 605, 660, 726, 983, 990, 1089, 1210, 1452, 1815, 1966, 1980, 2178, 2420, 2949, 3630, 3932, 4356, 4915, 5445, 5898, 7260, 8847, 9830, 10813, 10890, 11796, 14745, 17694, 19660, 21626, 21780, 29490, 32439, 35388, 43252, 44235, 54065, 58980, 64878, 88470, 97317, 108130, 118943, 129756, 162195, 176940, 194634, 216260, 237886, 324390, 356829, 389268, 475772, 486585, 594715, 648780, 713658, 973170, 1070487, 1189430, 1427316, 1784145, 1946340, 2140974, 2378860, 3568290, 4281948, 5352435, 7136580, 10704870, 21409740]

約数ペア:

[(1, 21409740), (2, 10704870), (3, 7136580), (4, 5352435), (5, 4281948), (6, 3568290), (9, 2378860), (10, 2140974), (11, 1946340), (12, 1784145), (15, 1427316), (18, 1189430), (20, 1070487), (22, 973170), (30, 713658), (33, 648780), (36, 594715), (44, 486585), (45, 475772), (55, 389268), (60, 356829), (66, 324390), (90, 237886), (99, 216260), (110, 194634), (121, 176940), (132, 162195), (165, 129756), (180, 118943), (198, 108130), (220, 97317), (242, 88470), (330, 64878), (363, 58980), (396, 54065), (484, 44235), (495, 43252), (605, 35388), (660, 32439), (726, 29490), (983, 21780), (990, 21626), (1089, 19660), (1210, 17694), (1452, 14745), (1815, 11796), (1966, 10890), (1980, 10813), (2178, 9830), (2420, 8847), (2949, 7260), (3630, 5898), (3932, 5445), (4356, 4915)]