20989840

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{4447}}^1$

素因数の和:4519

約数の個数: 40

約数和(自身を含む): 49639680

約数和(自身を除く): 28649840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1180, 2360, 4447, 4720, 8894, 17788, 22235, 35576, 44470, 71152, 88940, 177880, 262373, 355760, 524746, 1049492, 1311865, 2098984, 2623730, 4197968, 5247460, 10494920, 20989840]

約数ペア:

[(1, 20989840), (2, 10494920), (4, 5247460), (5, 4197968), (8, 2623730), (10, 2098984), (16, 1311865), (20, 1049492), (40, 524746), (59, 355760), (80, 262373), (118, 177880), (236, 88940), (295, 71152), (472, 44470), (590, 35576), (944, 22235), (1180, 17788), (2360, 8894), (4447, 4720)]