7952802020

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1831}}^1\times {\mathrm{2749}}^1$

素因数の和:4668

約数の個数: 48

約数和(自身を含む): 16927680000

約数和(自身を除く): 8974877980

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 1831, 2749, 3662, 5498, 7324, 9155, 10996, 13745, 18310, 27490, 36620, 54980, 144649, 217171, 289298, 434342, 578596, 723245, 868684, 1085855, 1446490, 2171710, 2892980, 4343420, 5033419, 10066838, 20133676, 25167095, 50334190, 100668380, 397640101, 795280202, 1590560404, 1988200505, 3976401010, 7952802020]

約数ペア:

[(1, 7952802020), (2, 3976401010), (4, 1988200505), (5, 1590560404), (10, 795280202), (20, 397640101), (79, 100668380), (158, 50334190), (316, 25167095), (395, 20133676), (790, 10066838), (1580, 5033419), (1831, 4343420), (2749, 2892980), (3662, 2171710), (5498, 1446490), (7324, 1085855), (9155, 868684), (10996, 723245), (13745, 578596), (18310, 434342), (27490, 289298), (36620, 217171), (54980, 144649)]