21317205

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1$

素因数の和:155

約数の個数: 96

約数和(自身を含む): 45045504

約数和(自身を除く): 23728299

約数列:

[1, 3, 5, 7, 13, 15, 21, 23, 35, 39, 49, 65, 69, 91, 97, 105, 115, 147, 161, 195, 245, 273, 291, 299, 345, 455, 483, 485, 637, 679, 735, 805, 897, 1127, 1261, 1365, 1455, 1495, 1911, 2037, 2093, 2231, 2415, 3185, 3381, 3395, 3783, 4485, 4753, 5635, 6279, 6305, 6693, 8827, 9555, 10185, 10465, 11155, 14259, 14651, 15617, 16905, 18915, 23765, 26481, 29003, 31395, 33465, 43953, 44135, 46851, 61789, 71295, 73255, 78085, 87009, 109319, 132405, 145015, 185367, 203021, 219765, 234255, 308945, 327957, 435045, 546595, 609063, 926835, 1015105, 1421147, 1639785, 3045315, 4263441, 7105735, 21317205]

約数ペア:

[(1, 21317205), (3, 7105735), (5, 4263441), (7, 3045315), (13, 1639785), (15, 1421147), (21, 1015105), (23, 926835), (35, 609063), (39, 546595), (49, 435045), (65, 327957), (69, 308945), (91, 234255), (97, 219765), (105, 203021), (115, 185367), (147, 145015), (161, 132405), (195, 109319), (245, 87009), (273, 78085), (291, 73255), (299, 71295), (345, 61789), (455, 46851), (483, 44135), (485, 43953), (637, 33465), (679, 31395), (735, 29003), (805, 26481), (897, 23765), (1127, 18915), (1261, 16905), (1365, 15617), (1455, 14651), (1495, 14259), (1911, 11155), (2037, 10465), (2093, 10185), (2231, 9555), (2415, 8827), (3185, 6693), (3381, 6305), (3395, 6279), (3783, 5635), (4485, 4753)]