8407820

素因数分解:

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

素因数の和:302

約数の個数: 48

約数和(自身を含む): 18579456

約数和(自身を除く): 10171636

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 71, 124, 142, 155, 191, 284, 310, 355, 382, 620, 710, 764, 955, 1420, 1910, 2201, 3820, 4402, 5921, 8804, 11005, 11842, 13561, 22010, 23684, 27122, 29605, 44020, 54244, 59210, 67805, 118420, 135610, 271220, 420391, 840782, 1681564, 2101955, 4203910, 8407820]

約数ペア:

[(1, 8407820), (2, 4203910), (4, 2101955), (5, 1681564), (10, 840782), (20, 420391), (31, 271220), (62, 135610), (71, 118420), (124, 67805), (142, 59210), (155, 54244), (191, 44020), (284, 29605), (310, 27122), (355, 23684), (382, 22010), (620, 13561), (710, 11842), (764, 11005), (955, 8804), (1420, 5921), (1910, 4402), (2201, 3820)]