21903420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{431}}^1$

素因数の和:472

約数の個数: 144

約数和(自身を含む): 77220864

約数和(自身を除く): 55317444

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 44, 55, 60, 66, 70, 77, 84, 105, 110, 121, 132, 140, 154, 165, 210, 220, 231, 242, 308, 330, 363, 385, 420, 431, 462, 484, 605, 660, 726, 770, 847, 862, 924, 1155, 1210, 1293, 1452, 1540, 1694, 1724, 1815, 2155, 2310, 2420, 2541, 2586, 3017, 3388, 3630, 4235, 4310, 4620, 4741, 5082, 5172, 6034, 6465, 7260, 8470, 8620, 9051, 9482, 10164, 12068, 12705, 12930, 14223, 15085, 16940, 18102, 18964, 23705, 25410, 25860, 28446, 30170, 33187, 36204, 45255, 47410, 50820, 52151, 56892, 60340, 66374, 71115, 90510, 94820, 99561, 104302, 132748, 142230, 156453, 165935, 181020, 199122, 208604, 260755, 284460, 312906, 331870, 365057, 398244, 497805, 521510, 625812, 663740, 730114, 782265, 995610, 1043020, 1095171, 1460228, 1564530, 1825285, 1991220, 2190342, 3129060, 3650570, 4380684, 5475855, 7301140, 10951710, 21903420]

約数ペア:

[(1, 21903420), (2, 10951710), (3, 7301140), (4, 5475855), (5, 4380684), (6, 3650570), (7, 3129060), (10, 2190342), (11, 1991220), (12, 1825285), (14, 1564530), (15, 1460228), (20, 1095171), (21, 1043020), (22, 995610), (28, 782265), (30, 730114), (33, 663740), (35, 625812), (42, 521510), (44, 497805), (55, 398244), (60, 365057), (66, 331870), (70, 312906), (77, 284460), (84, 260755), (105, 208604), (110, 199122), (121, 181020), (132, 165935), (140, 156453), (154, 142230), (165, 132748), (210, 104302), (220, 99561), (231, 94820), (242, 90510), (308, 71115), (330, 66374), (363, 60340), (385, 56892), (420, 52151), (431, 50820), (462, 47410), (484, 45255), (605, 36204), (660, 33187), (726, 30170), (770, 28446), (847, 25860), (862, 25410), (924, 23705), (1155, 18964), (1210, 18102), (1293, 16940), (1452, 15085), (1540, 14223), (1694, 12930), (1724, 12705), (1815, 12068), (2155, 10164), (2310, 9482), (2420, 9051), (2541, 8620), (2586, 8470), (3017, 7260), (3388, 6465), (3630, 6034), (4235, 5172), (4310, 5082), (4620, 4741)]