19721680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{307}}^1$

素因数の和:404

約数の個数: 80

約数和(自身を含む): 50871744

約数和(自身を除く): 31150064

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 73, 80, 88, 110, 146, 176, 220, 292, 307, 365, 440, 584, 614, 730, 803, 880, 1168, 1228, 1460, 1535, 1606, 2456, 2920, 3070, 3212, 3377, 4015, 4912, 5840, 6140, 6424, 6754, 8030, 12280, 12848, 13508, 16060, 16885, 22411, 24560, 27016, 32120, 33770, 44822, 54032, 64240, 67540, 89644, 112055, 135080, 179288, 224110, 246521, 270160, 358576, 448220, 493042, 896440, 986084, 1232605, 1792880, 1972168, 2465210, 3944336, 4930420, 9860840, 19721680]

約数ペア:

[(1, 19721680), (2, 9860840), (4, 4930420), (5, 3944336), (8, 2465210), (10, 1972168), (11, 1792880), (16, 1232605), (20, 986084), (22, 896440), (40, 493042), (44, 448220), (55, 358576), (73, 270160), (80, 246521), (88, 224110), (110, 179288), (146, 135080), (176, 112055), (220, 89644), (292, 67540), (307, 64240), (365, 54032), (440, 44822), (584, 33770), (614, 32120), (730, 27016), (803, 24560), (880, 22411), (1168, 16885), (1228, 16060), (1460, 13508), (1535, 12848), (1606, 12280), (2456, 8030), (2920, 6754), (3070, 6424), (3212, 6140), (3377, 5840), (4015, 4912)]