16815640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:304

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 22997480

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 71, 124, 142, 155, 191, 248, 284, 310, 355, 382, 568, 620, 710, 764, 955, 1240, 1420, 1528, 1910, 2201, 2840, 3820, 4402, 5921, 7640, 8804, 11005, 11842, 13561, 17608, 22010, 23684, 27122, 29605, 44020, 47368, 54244, 59210, 67805, 88040, 108488, 118420, 135610, 236840, 271220, 420391, 542440, 840782, 1681564, 2101955, 3363128, 4203910, 8407820, 16815640]

約数ペア:

[(1, 16815640), (2, 8407820), (4, 4203910), (5, 3363128), (8, 2101955), (10, 1681564), (20, 840782), (31, 542440), (40, 420391), (62, 271220), (71, 236840), (124, 135610), (142, 118420), (155, 108488), (191, 88040), (248, 67805), (284, 59210), (310, 54244), (355, 47368), (382, 44020), (568, 29605), (620, 27122), (710, 23684), (764, 22010), (955, 17608), (1240, 13561), (1420, 11842), (1528, 11005), (1910, 8804), (2201, 7640), (2840, 5921), (3820, 4402)]