21785452

素因数分解:

$2^2\times {\mathrm{13}}^3\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:147

約数の個数: 48

約数和(自身を含む): 43049440

約数和(自身を除く): 21263988

約数列:

[1, 2, 4, 13, 26, 37, 52, 67, 74, 134, 148, 169, 268, 338, 481, 676, 871, 962, 1742, 1924, 2197, 2479, 3484, 4394, 4958, 6253, 8788, 9916, 11323, 12506, 22646, 25012, 32227, 45292, 64454, 81289, 128908, 147199, 162578, 294398, 325156, 418951, 588796, 837902, 1675804, 5446363, 10892726, 21785452]

約数ペア:

[(1, 21785452), (2, 10892726), (4, 5446363), (13, 1675804), (26, 837902), (37, 588796), (52, 418951), (67, 325156), (74, 294398), (134, 162578), (148, 147199), (169, 128908), (268, 81289), (338, 64454), (481, 45292), (676, 32227), (871, 25012), (962, 22646), (1742, 12506), (1924, 11323), (2197, 9916), (2479, 8788), (3484, 6253), (4394, 4958)]