128465240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1\times {\mathrm{491}}^1$

素因数の和:744

約数の個数: 64

約数和(自身を含む): 300395520

約数和(自身を除く): 171930280

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 211, 248, 310, 422, 491, 620, 844, 982, 1055, 1240, 1688, 1964, 2110, 2455, 3928, 4220, 4910, 6541, 8440, 9820, 13082, 15221, 19640, 26164, 30442, 32705, 52328, 60884, 65410, 76105, 103601, 121768, 130820, 152210, 207202, 261640, 304420, 414404, 518005, 608840, 828808, 1036010, 2072020, 3211631, 4144040, 6423262, 12846524, 16058155, 25693048, 32116310, 64232620, 128465240]

約数ペア:

[(1, 128465240), (2, 64232620), (4, 32116310), (5, 25693048), (8, 16058155), (10, 12846524), (20, 6423262), (31, 4144040), (40, 3211631), (62, 2072020), (124, 1036010), (155, 828808), (211, 608840), (248, 518005), (310, 414404), (422, 304420), (491, 261640), (620, 207202), (844, 152210), (982, 130820), (1055, 121768), (1240, 103601), (1688, 76105), (1964, 65410), (2110, 60884), (2455, 52328), (3928, 32705), (4220, 30442), (4910, 26164), (6541, 19640), (8440, 15221), (9820, 13082)]