17958820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{181}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 42699384

約数和(自身を除く): 24740564

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 121, 164, 181, 205, 220, 242, 362, 410, 451, 484, 605, 724, 820, 902, 905, 1210, 1804, 1810, 1991, 2255, 2420, 3620, 3982, 4510, 4961, 7421, 7964, 9020, 9922, 9955, 14842, 19844, 19910, 21901, 24805, 29684, 37105, 39820, 43802, 49610, 74210, 81631, 87604, 99220, 109505, 148420, 163262, 219010, 326524, 408155, 438020, 816310, 897941, 1632620, 1795882, 3591764, 4489705, 8979410, 17958820]

約数ペア:

[(1, 17958820), (2, 8979410), (4, 4489705), (5, 3591764), (10, 1795882), (11, 1632620), (20, 897941), (22, 816310), (41, 438020), (44, 408155), (55, 326524), (82, 219010), (110, 163262), (121, 148420), (164, 109505), (181, 99220), (205, 87604), (220, 81631), (242, 74210), (362, 49610), (410, 43802), (451, 39820), (484, 37105), (605, 29684), (724, 24805), (820, 21901), (902, 19910), (905, 19844), (1210, 14842), (1804, 9955), (1810, 9922), (1991, 9020), (2255, 7964), (2420, 7421), (3620, 4961), (3982, 4510)]