51998840

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{211}}^1$

素因数の和:384

約数の個数: 64

約数和(自身を含む): 120661920

約数和(自身を除く): 68663080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 101, 122, 202, 211, 244, 305, 404, 422, 488, 505, 610, 808, 844, 1010, 1055, 1220, 1688, 2020, 2110, 2440, 4040, 4220, 6161, 8440, 12322, 12871, 21311, 24644, 25742, 30805, 42622, 49288, 51484, 61610, 64355, 85244, 102968, 106555, 123220, 128710, 170488, 213110, 246440, 257420, 426220, 514840, 852440, 1299971, 2599942, 5199884, 6499855, 10399768, 12999710, 25999420, 51998840]

約数ペア:

[(1, 51998840), (2, 25999420), (4, 12999710), (5, 10399768), (8, 6499855), (10, 5199884), (20, 2599942), (40, 1299971), (61, 852440), (101, 514840), (122, 426220), (202, 257420), (211, 246440), (244, 213110), (305, 170488), (404, 128710), (422, 123220), (488, 106555), (505, 102968), (610, 85244), (808, 64355), (844, 61610), (1010, 51484), (1055, 49288), (1220, 42622), (1688, 30805), (2020, 25742), (2110, 24644), (2440, 21311), (4040, 12871), (4220, 12322), (6161, 8440)]