20544440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{307}}^1$

素因数の和:564

約数の個数: 64

約数和(自身を含む): 53222400

約数和(自身を除く): 32677960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 239, 280, 307, 478, 614, 956, 1195, 1228, 1535, 1673, 1912, 2149, 2390, 2456, 3070, 3346, 4298, 4780, 6140, 6692, 8365, 8596, 9560, 10745, 12280, 13384, 16730, 17192, 21490, 33460, 42980, 66920, 73373, 85960, 146746, 293492, 366865, 513611, 586984, 733730, 1027222, 1467460, 2054444, 2568055, 2934920, 4108888, 5136110, 10272220, 20544440]

約数ペア:

[(1, 20544440), (2, 10272220), (4, 5136110), (5, 4108888), (7, 2934920), (8, 2568055), (10, 2054444), (14, 1467460), (20, 1027222), (28, 733730), (35, 586984), (40, 513611), (56, 366865), (70, 293492), (140, 146746), (239, 85960), (280, 73373), (307, 66920), (478, 42980), (614, 33460), (956, 21490), (1195, 17192), (1228, 16730), (1535, 13384), (1673, 12280), (1912, 10745), (2149, 9560), (2390, 8596), (2456, 8365), (3070, 6692), (3346, 6140), (4298, 4780)]