15960040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:314

約数の個数: 64

約数和(自身を含む): 37854720

約数和(自身を除く): 21894680

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 61, 62, 122, 124, 155, 211, 244, 248, 305, 310, 422, 488, 610, 620, 844, 1055, 1220, 1240, 1688, 1891, 2110, 2440, 3782, 4220, 6541, 7564, 8440, 9455, 12871, 13082, 15128, 18910, 25742, 26164, 32705, 37820, 51484, 52328, 64355, 65410, 75640, 102968, 128710, 130820, 257420, 261640, 399001, 514840, 798002, 1596004, 1995005, 3192008, 3990010, 7980020, 15960040]

約数ペア:

[(1, 15960040), (2, 7980020), (4, 3990010), (5, 3192008), (8, 1995005), (10, 1596004), (20, 798002), (31, 514840), (40, 399001), (61, 261640), (62, 257420), (122, 130820), (124, 128710), (155, 102968), (211, 75640), (244, 65410), (248, 64355), (305, 52328), (310, 51484), (422, 37820), (488, 32705), (610, 26164), (620, 25742), (844, 18910), (1055, 15128), (1220, 13082), (1240, 12871), (1688, 9455), (1891, 8440), (2110, 7564), (2440, 6541), (3782, 4220)]