31386940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1979}}^1$

素因数の和:2062

約数の個数: 48

約数和(自身を含む): 72182880

約数和(自身を除く): 40795940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 122, 130, 244, 260, 305, 610, 793, 1220, 1586, 1979, 3172, 3958, 3965, 7916, 7930, 9895, 15860, 19790, 25727, 39580, 51454, 102908, 120719, 128635, 241438, 257270, 482876, 514540, 603595, 1207190, 1569347, 2414380, 3138694, 6277388, 7846735, 15693470, 31386940]

約数ペア:

[(1, 31386940), (2, 15693470), (4, 7846735), (5, 6277388), (10, 3138694), (13, 2414380), (20, 1569347), (26, 1207190), (52, 603595), (61, 514540), (65, 482876), (122, 257270), (130, 241438), (244, 128635), (260, 120719), (305, 102908), (610, 51454), (793, 39580), (1220, 25727), (1586, 19790), (1979, 15860), (3172, 9895), (3958, 7930), (3965, 7916)]