31939960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{257}}^1$

素因数の和:520

約数の個数: 64

約数和(自身を含む): 78019200

約数和(自身を除く): 46079240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 239, 257, 260, 478, 514, 520, 956, 1028, 1195, 1285, 1912, 2056, 2390, 2570, 3107, 3341, 4780, 5140, 6214, 6682, 9560, 10280, 12428, 13364, 15535, 16705, 24856, 26728, 31070, 33410, 61423, 62140, 66820, 122846, 124280, 133640, 245692, 307115, 491384, 614230, 798499, 1228460, 1596998, 2456920, 3193996, 3992495, 6387992, 7984990, 15969980, 31939960]

約数ペア:

[(1, 31939960), (2, 15969980), (4, 7984990), (5, 6387992), (8, 3992495), (10, 3193996), (13, 2456920), (20, 1596998), (26, 1228460), (40, 798499), (52, 614230), (65, 491384), (104, 307115), (130, 245692), (239, 133640), (257, 124280), (260, 122846), (478, 66820), (514, 62140), (520, 61423), (956, 33410), (1028, 31070), (1195, 26728), (1285, 24856), (1912, 16705), (2056, 15535), (2390, 13364), (2570, 12428), (3107, 10280), (3341, 9560), (4780, 6682), (5140, 6214)]