21197410

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^2\times {\mathrm{97}}^1$

素因数の和:199

約数の個数: 48

約数和(自身を含む): 42551208

約数和(自身を除く): 21353798

約数列:

[1, 2, 5, 10, 13, 26, 41, 65, 82, 97, 130, 194, 205, 410, 485, 533, 970, 1066, 1261, 1681, 2522, 2665, 3362, 3977, 5330, 6305, 7954, 8405, 12610, 16810, 19885, 21853, 39770, 43706, 51701, 103402, 109265, 163057, 218530, 258505, 326114, 517010, 815285, 1630570, 2119741, 4239482, 10598705, 21197410]

約数ペア:

[(1, 21197410), (2, 10598705), (5, 4239482), (10, 2119741), (13, 1630570), (26, 815285), (41, 517010), (65, 326114), (82, 258505), (97, 218530), (130, 163057), (194, 109265), (205, 103402), (410, 51701), (485, 43706), (533, 39770), (970, 21853), (1066, 19885), (1261, 16810), (1681, 12610), (2522, 8405), (2665, 7954), (3362, 6305), (3977, 5330)]