20961960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{307}}^1\times {\mathrm{569}}^1$

素因数の和:890

約数の個数: 64

約数和(自身を含む): 63201600

約数和(自身を除く): 42239640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 307, 569, 614, 921, 1138, 1228, 1535, 1707, 1842, 2276, 2456, 2845, 3070, 3414, 3684, 4552, 4605, 5690, 6140, 6828, 7368, 8535, 9210, 11380, 12280, 13656, 17070, 18420, 22760, 34140, 36840, 68280, 174683, 349366, 524049, 698732, 873415, 1048098, 1397464, 1746830, 2096196, 2620245, 3493660, 4192392, 5240490, 6987320, 10480980, 20961960]

約数ペア:

[(1, 20961960), (2, 10480980), (3, 6987320), (4, 5240490), (5, 4192392), (6, 3493660), (8, 2620245), (10, 2096196), (12, 1746830), (15, 1397464), (20, 1048098), (24, 873415), (30, 698732), (40, 524049), (60, 349366), (120, 174683), (307, 68280), (569, 36840), (614, 34140), (921, 22760), (1138, 18420), (1228, 17070), (1535, 13656), (1707, 12280), (1842, 11380), (2276, 9210), (2456, 8535), (2845, 7368), (3070, 6828), (3414, 6140), (3684, 5690), (4552, 4605)]