21558020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 53222400

約数和(自身を除く): 31664380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 29, 31, 44, 55, 58, 62, 109, 110, 116, 124, 145, 155, 218, 220, 290, 310, 319, 341, 436, 545, 580, 620, 638, 682, 899, 1090, 1199, 1276, 1364, 1595, 1705, 1798, 2180, 2398, 3161, 3190, 3379, 3410, 3596, 4495, 4796, 5995, 6322, 6380, 6758, 6820, 8990, 9889, 11990, 12644, 13516, 15805, 16895, 17980, 19778, 23980, 31610, 33790, 34771, 37169, 39556, 49445, 63220, 67580, 69542, 74338, 97991, 98890, 139084, 148676, 173855, 185845, 195982, 197780, 347710, 371690, 391964, 489955, 695420, 743380, 979910, 1077901, 1959820, 2155802, 4311604, 5389505, 10779010, 21558020]

約数ペア:

[(1, 21558020), (2, 10779010), (4, 5389505), (5, 4311604), (10, 2155802), (11, 1959820), (20, 1077901), (22, 979910), (29, 743380), (31, 695420), (44, 489955), (55, 391964), (58, 371690), (62, 347710), (109, 197780), (110, 195982), (116, 185845), (124, 173855), (145, 148676), (155, 139084), (218, 98890), (220, 97991), (290, 74338), (310, 69542), (319, 67580), (341, 63220), (436, 49445), (545, 39556), (580, 37169), (620, 34771), (638, 33790), (682, 31610), (899, 23980), (1090, 19778), (1199, 17980), (1276, 16895), (1364, 15805), (1595, 13516), (1705, 12644), (1798, 11990), (2180, 9889), (2398, 8990), (3161, 6820), (3190, 6758), (3379, 6380), (3410, 6322), (3596, 5995), (4495, 4796)]