21261970

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{641}}^1$

素因数の和:786

約数の個数: 32

約数和(自身を含む): 39937536

約数和(自身を除く): 18675566

約数列:

[1, 2, 5, 10, 31, 62, 107, 155, 214, 310, 535, 641, 1070, 1282, 3205, 3317, 6410, 6634, 16585, 19871, 33170, 39742, 68587, 99355, 137174, 198710, 342935, 685870, 2126197, 4252394, 10630985, 21261970]

約数ペア:

[(1, 21261970), (2, 10630985), (5, 4252394), (10, 2126197), (31, 685870), (62, 342935), (107, 198710), (155, 137174), (214, 99355), (310, 68587), (535, 39742), (641, 33170), (1070, 19871), (1282, 16585), (3205, 6634), (3317, 6410)]