81434220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193891}}^1$

素因数の和:193910

約数の個数: 48

約数和(自身を含む): 260590848

約数和(自身を除く): 179156628

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 193891, 387782, 581673, 775564, 969455, 1163346, 1357237, 1938910, 2326692, 2714474, 2908365, 3877820, 4071711, 5428948, 5816730, 6786185, 8143422, 11633460, 13572370, 16286844, 20358555, 27144740, 40717110, 81434220]

約数ペア:

[(1, 81434220), (2, 40717110), (3, 27144740), (4, 20358555), (5, 16286844), (6, 13572370), (7, 11633460), (10, 8143422), (12, 6786185), (14, 5816730), (15, 5428948), (20, 4071711), (21, 3877820), (28, 2908365), (30, 2714474), (35, 2326692), (42, 1938910), (60, 1357237), (70, 1163346), (84, 969455), (105, 775564), (140, 581673), (210, 387782), (420, 193891)]