20919920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37357}}^1$

素因数の和:37377

約数の個数: 40

約数和(自身を含む): 55588704

約数和(自身を除く): 34668784

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37357, 74714, 149428, 186785, 261499, 298856, 373570, 522998, 597712, 747140, 1045996, 1307495, 1494280, 2091992, 2614990, 2988560, 4183984, 5229980, 10459960, 20919920]

約数ペア:

[(1, 20919920), (2, 10459960), (4, 5229980), (5, 4183984), (7, 2988560), (8, 2614990), (10, 2091992), (14, 1494280), (16, 1307495), (20, 1045996), (28, 747140), (35, 597712), (40, 522998), (56, 373570), (70, 298856), (80, 261499), (112, 186785), (140, 149428), (280, 74714), (560, 37357)]