21254490

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1699}}^1$

素因数の和:1851

約数の個数: 48

約数和(自身を含む): 55692000

約数和(自身を除く): 34437510

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 139, 278, 417, 695, 834, 1251, 1390, 1699, 2085, 2502, 3398, 4170, 5097, 6255, 8495, 10194, 12510, 15291, 16990, 25485, 30582, 50970, 76455, 152910, 236161, 472322, 708483, 1180805, 1416966, 2125449, 2361610, 3542415, 4250898, 7084830, 10627245, 21254490]

約数ペア:

[(1, 21254490), (2, 10627245), (3, 7084830), (5, 4250898), (6, 3542415), (9, 2361610), (10, 2125449), (15, 1416966), (18, 1180805), (30, 708483), (45, 472322), (90, 236161), (139, 152910), (278, 76455), (417, 50970), (695, 30582), (834, 25485), (1251, 16990), (1390, 15291), (1699, 12510), (2085, 10194), (2502, 8495), (3398, 6255), (4170, 5097)]