199392920

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{20857}}^1$

素因数の和:21107

約数の個数: 32

約数和(自身を含む): 450532800

約数和(自身を除く): 251139880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 2390, 4780, 9560, 20857, 41714, 83428, 104285, 166856, 208570, 417140, 834280, 4984823, 9969646, 19939292, 24924115, 39878584, 49848230, 99696460, 199392920]

約数ペア:

[(1, 199392920), (2, 99696460), (4, 49848230), (5, 39878584), (8, 24924115), (10, 19939292), (20, 9969646), (40, 4984823), (239, 834280), (478, 417140), (956, 208570), (1195, 166856), (1912, 104285), (2390, 83428), (4780, 41714), (9560, 20857)]