8139980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{691}}^1$

素因数の和:750

約数の個数: 48

約数和(自身を含む): 18600960

約数和(自身を除く): 10460980

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 38, 62, 76, 95, 124, 155, 190, 310, 380, 589, 620, 691, 1178, 1382, 2356, 2764, 2945, 3455, 5890, 6910, 11780, 13129, 13820, 21421, 26258, 42842, 52516, 65645, 85684, 107105, 131290, 214210, 262580, 406999, 428420, 813998, 1627996, 2034995, 4069990, 8139980]

約数ペア:

[(1, 8139980), (2, 4069990), (4, 2034995), (5, 1627996), (10, 813998), (19, 428420), (20, 406999), (31, 262580), (38, 214210), (62, 131290), (76, 107105), (95, 85684), (124, 65645), (155, 52516), (190, 42842), (310, 26258), (380, 21421), (589, 13820), (620, 13129), (691, 11780), (1178, 6910), (1382, 5890), (2356, 3455), (2764, 2945)]