21254920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27967}}^1$

素因数の和:27997

約数の個数: 32

約数和(自身を含む): 50342400

約数和(自身を除く): 29087480

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27967, 55934, 111868, 139835, 223736, 279670, 531373, 559340, 1062746, 1118680, 2125492, 2656865, 4250984, 5313730, 10627460, 21254920]

約数ペア:

[(1, 21254920), (2, 10627460), (4, 5313730), (5, 4250984), (8, 2656865), (10, 2125492), (19, 1118680), (20, 1062746), (38, 559340), (40, 531373), (76, 279670), (95, 223736), (152, 139835), (190, 111868), (380, 55934), (760, 27967)]