21010828

素因数分解:

$2^2\times {\mathrm{101}}^1\times {\mathrm{131}}^1\times {\mathrm{397}}^1$

素因数の和:633

約数の個数: 24

約数和(自身を含む): 37510704

約数和(自身を除く): 16499876

約数列:

[1, 2, 4, 101, 131, 202, 262, 397, 404, 524, 794, 1588, 13231, 26462, 40097, 52007, 52924, 80194, 104014, 160388, 208028, 5252707, 10505414, 21010828]

約数ペア:

[(1, 21010828), (2, 10505414), (4, 5252707), (101, 208028), (131, 160388), (202, 104014), (262, 80194), (397, 52924), (404, 52007), (524, 40097), (794, 26462), (1588, 13231)]