28004990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{73}}^1\times {\mathrm{227}}^1$

素因数の和:333

約数の個数: 48

約数和(自身を含む): 55576368

約数和(自身を除く): 27571378

約数列:

[1, 2, 5, 10, 13, 26, 65, 73, 130, 146, 169, 227, 338, 365, 454, 730, 845, 949, 1135, 1690, 1898, 2270, 2951, 4745, 5902, 9490, 12337, 14755, 16571, 24674, 29510, 33142, 38363, 61685, 76726, 82855, 123370, 165710, 191815, 215423, 383630, 430846, 1077115, 2154230, 2800499, 5600998, 14002495, 28004990]

約数ペア:

[(1, 28004990), (2, 14002495), (5, 5600998), (10, 2800499), (13, 2154230), (26, 1077115), (65, 430846), (73, 383630), (130, 215423), (146, 191815), (169, 165710), (227, 123370), (338, 82855), (365, 76726), (454, 61685), (730, 38363), (845, 33142), (949, 29510), (1135, 24674), (1690, 16571), (1898, 14755), (2270, 12337), (2951, 9490), (4745, 5902)]