21260792

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{331}}^1$

素因数の和:412

約数の個数: 64

約数和(自身を含む): 48445440

約数和(自身を除く): 27184648

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 37, 56, 62, 74, 124, 148, 217, 248, 259, 296, 331, 434, 518, 662, 868, 1036, 1147, 1324, 1736, 2072, 2294, 2317, 2648, 4588, 4634, 8029, 9176, 9268, 10261, 12247, 16058, 18536, 20522, 24494, 32116, 41044, 48988, 64232, 71827, 82088, 85729, 97976, 143654, 171458, 287308, 342916, 379657, 574616, 685832, 759314, 1518628, 2657599, 3037256, 5315198, 10630396, 21260792]

約数ペア:

[(1, 21260792), (2, 10630396), (4, 5315198), (7, 3037256), (8, 2657599), (14, 1518628), (28, 759314), (31, 685832), (37, 574616), (56, 379657), (62, 342916), (74, 287308), (124, 171458), (148, 143654), (217, 97976), (248, 85729), (259, 82088), (296, 71827), (331, 64232), (434, 48988), (518, 41044), (662, 32116), (868, 24494), (1036, 20522), (1147, 18536), (1324, 16058), (1736, 12247), (2072, 10261), (2294, 9268), (2317, 9176), (2648, 8029), (4588, 4634)]