19717960

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{271}}^1$

素因数の和:406

約数の個数: 64

約数和(自身を含む): 47589120

約数和(自身を除く): 27871160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 107, 136, 170, 214, 271, 340, 428, 535, 542, 680, 856, 1070, 1084, 1355, 1819, 2140, 2168, 2710, 3638, 4280, 4607, 5420, 7276, 9095, 9214, 10840, 14552, 18190, 18428, 23035, 28997, 36380, 36856, 46070, 57994, 72760, 92140, 115988, 144985, 184280, 231976, 289970, 492949, 579940, 985898, 1159880, 1971796, 2464745, 3943592, 4929490, 9858980, 19717960]

約数ペア:

[(1, 19717960), (2, 9858980), (4, 4929490), (5, 3943592), (8, 2464745), (10, 1971796), (17, 1159880), (20, 985898), (34, 579940), (40, 492949), (68, 289970), (85, 231976), (107, 184280), (136, 144985), (170, 115988), (214, 92140), (271, 72760), (340, 57994), (428, 46070), (535, 36856), (542, 36380), (680, 28997), (856, 23035), (1070, 18428), (1084, 18190), (1355, 14552), (1819, 10840), (2140, 9214), (2168, 9095), (2710, 7276), (3638, 5420), (4280, 4607)]