28309840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{167}}^1$

素因数の和:356

約数の個数: 80

約数和(自身を含む): 71745408

約数和(自身を除く): 43435568

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 163, 167, 208, 260, 326, 334, 520, 652, 668, 815, 835, 1040, 1304, 1336, 1630, 1670, 2119, 2171, 2608, 2672, 3260, 3340, 4238, 4342, 6520, 6680, 8476, 8684, 10595, 10855, 13040, 13360, 16952, 17368, 21190, 21710, 27221, 33904, 34736, 42380, 43420, 54442, 84760, 86840, 108884, 136105, 169520, 173680, 217768, 272210, 353873, 435536, 544420, 707746, 1088840, 1415492, 1769365, 2177680, 2830984, 3538730, 5661968, 7077460, 14154920, 28309840]

約数ペア:

[(1, 28309840), (2, 14154920), (4, 7077460), (5, 5661968), (8, 3538730), (10, 2830984), (13, 2177680), (16, 1769365), (20, 1415492), (26, 1088840), (40, 707746), (52, 544420), (65, 435536), (80, 353873), (104, 272210), (130, 217768), (163, 173680), (167, 169520), (208, 136105), (260, 108884), (326, 86840), (334, 84760), (520, 54442), (652, 43420), (668, 42380), (815, 34736), (835, 33904), (1040, 27221), (1304, 21710), (1336, 21190), (1630, 17368), (1670, 16952), (2119, 13360), (2171, 13040), (2608, 10855), (2672, 10595), (3260, 8684), (3340, 8476), (4238, 6680), (4342, 6520)]