21256680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{307}}^1\times {\mathrm{577}}^1$

素因数の和:898

約数の個数: 64

約数和(自身を含む): 64088640

約数和(自身を除く): 42831960

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 307, 577, 614, 921, 1154, 1228, 1535, 1731, 1842, 2308, 2456, 2885, 3070, 3462, 3684, 4605, 4616, 5770, 6140, 6924, 7368, 8655, 9210, 11540, 12280, 13848, 17310, 18420, 23080, 34620, 36840, 69240, 177139, 354278, 531417, 708556, 885695, 1062834, 1417112, 1771390, 2125668, 2657085, 3542780, 4251336, 5314170, 7085560, 10628340, 21256680]

約数ペア:

[(1, 21256680), (2, 10628340), (3, 7085560), (4, 5314170), (5, 4251336), (6, 3542780), (8, 2657085), (10, 2125668), (12, 1771390), (15, 1417112), (20, 1062834), (24, 885695), (30, 708556), (40, 531417), (60, 354278), (120, 177139), (307, 69240), (577, 36840), (614, 34620), (921, 23080), (1154, 18420), (1228, 17310), (1535, 13848), (1731, 12280), (1842, 11540), (2308, 9210), (2456, 8655), (2885, 7368), (3070, 6924), (3462, 6140), (3684, 5770), (4605, 4616)]