77963980

素因数分解:

$2^2\times 5^1\times {\mathrm{1831}}^1\times {\mathrm{2129}}^1$

素因数の和:3969

約数の個数: 24

約数和(自身を含む): 163890720

約数和(自身を除く): 85926740

約数列:

[1, 2, 4, 5, 10, 20, 1831, 2129, 3662, 4258, 7324, 8516, 9155, 10645, 18310, 21290, 36620, 42580, 3898199, 7796398, 15592796, 19490995, 38981990, 77963980]

約数ペア:

[(1, 77963980), (2, 38981990), (4, 19490995), (5, 15592796), (10, 7796398), (20, 3898199), (1831, 42580), (2129, 36620), (3662, 21290), (4258, 18310), (7324, 10645), (8516, 9155)]