20948880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{191}}^1\times {\mathrm{457}}^1$

素因数の和:664

約数の個数: 80

約数和(自身を含む): 65424384

約数和(自身を除く): 44475504

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 191, 240, 382, 457, 573, 764, 914, 955, 1146, 1371, 1528, 1828, 1910, 2285, 2292, 2742, 2865, 3056, 3656, 3820, 4570, 4584, 5484, 5730, 6855, 7312, 7640, 9140, 9168, 10968, 11460, 13710, 15280, 18280, 21936, 22920, 27420, 36560, 45840, 54840, 87287, 109680, 174574, 261861, 349148, 436435, 523722, 698296, 872870, 1047444, 1309305, 1396592, 1745740, 2094888, 2618610, 3491480, 4189776, 5237220, 6982960, 10474440, 20948880]

約数ペア:

[(1, 20948880), (2, 10474440), (3, 6982960), (4, 5237220), (5, 4189776), (6, 3491480), (8, 2618610), (10, 2094888), (12, 1745740), (15, 1396592), (16, 1309305), (20, 1047444), (24, 872870), (30, 698296), (40, 523722), (48, 436435), (60, 349148), (80, 261861), (120, 174574), (191, 109680), (240, 87287), (382, 54840), (457, 45840), (573, 36560), (764, 27420), (914, 22920), (955, 21936), (1146, 18280), (1371, 15280), (1528, 13710), (1828, 11460), (1910, 10968), (2285, 9168), (2292, 9140), (2742, 7640), (2865, 7312), (3056, 6855), (3656, 5730), (3820, 5484), (4570, 4584)]