266919020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1\times {\mathrm{1997}}^1$

素因数の和:2210

約数の個数: 48

約数和(自身を含む): 578013408

約数和(自身を除く): 311094388

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 163, 164, 205, 326, 410, 652, 815, 820, 1630, 1997, 3260, 3994, 6683, 7988, 9985, 13366, 19970, 26732, 33415, 39940, 66830, 81877, 133660, 163754, 325511, 327508, 409385, 651022, 818770, 1302044, 1627555, 1637540, 3255110, 6510220, 13345951, 26691902, 53383804, 66729755, 133459510, 266919020]

約数ペア:

[(1, 266919020), (2, 133459510), (4, 66729755), (5, 53383804), (10, 26691902), (20, 13345951), (41, 6510220), (82, 3255110), (163, 1637540), (164, 1627555), (205, 1302044), (326, 818770), (410, 651022), (652, 409385), (815, 327508), (820, 325511), (1630, 163754), (1997, 133660), (3260, 81877), (3994, 66830), (6683, 39940), (7988, 33415), (9985, 26732), (13366, 19970)]