21209540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1$

素因数の和:197

約数の個数: 96

約数和(自身を含む): 52907904

約数和(自身を除く): 31698364

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 53, 55, 68, 85, 106, 107, 110, 170, 187, 212, 214, 220, 265, 340, 374, 428, 530, 535, 583, 748, 901, 935, 1060, 1070, 1166, 1177, 1802, 1819, 1870, 2140, 2332, 2354, 2915, 3604, 3638, 3740, 4505, 4708, 5671, 5830, 5885, 7276, 9010, 9095, 9911, 11342, 11660, 11770, 18020, 18190, 19822, 20009, 22684, 23540, 28355, 36380, 39644, 40018, 49555, 56710, 62381, 80036, 96407, 99110, 100045, 113420, 124762, 192814, 198220, 200090, 249524, 311905, 385628, 400180, 482035, 623810, 964070, 1060477, 1247620, 1928140, 2120954, 4241908, 5302385, 10604770, 21209540]

約数ペア:

[(1, 21209540), (2, 10604770), (4, 5302385), (5, 4241908), (10, 2120954), (11, 1928140), (17, 1247620), (20, 1060477), (22, 964070), (34, 623810), (44, 482035), (53, 400180), (55, 385628), (68, 311905), (85, 249524), (106, 200090), (107, 198220), (110, 192814), (170, 124762), (187, 113420), (212, 100045), (214, 99110), (220, 96407), (265, 80036), (340, 62381), (374, 56710), (428, 49555), (530, 40018), (535, 39644), (583, 36380), (748, 28355), (901, 23540), (935, 22684), (1060, 20009), (1070, 19822), (1166, 18190), (1177, 18020), (1802, 11770), (1819, 11660), (1870, 11342), (2140, 9911), (2332, 9095), (2354, 9010), (2915, 7276), (3604, 5885), (3638, 5830), (3740, 5671), (4505, 4708)]