256424870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{63629}}^1$

素因数の和:63680

約数の個数: 32

約数和(自身を含む): 513112320

約数和(自身を除く): 256687450

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 63629, 127258, 318145, 636290, 827177, 1654354, 1972499, 3944998, 4135885, 8271770, 9862495, 19724990, 25642487, 51284974, 128212435, 256424870]

約数ペア:

[(1, 256424870), (2, 128212435), (5, 51284974), (10, 25642487), (13, 19724990), (26, 9862495), (31, 8271770), (62, 4135885), (65, 3944998), (130, 1972499), (155, 1654354), (310, 827177), (403, 636290), (806, 318145), (2015, 127258), (4030, 63629)]