21000421408

素因数分解:

$2^5\times {\mathrm{239}}^2\times {\mathrm{11489}}^1$

素因数の和:11977

約数の個数: 36

約数和(自身を含む): 41521907070

約数和(自身を除く): 20521485662

約数列:

[1, 2, 4, 8, 16, 32, 239, 478, 956, 1912, 3824, 7648, 11489, 22978, 45956, 57121, 91912, 114242, 183824, 228484, 367648, 456968, 913936, 1827872, 2745871, 5491742, 10983484, 21966968, 43933936, 87867872, 656263169, 1312526338, 2625052676, 5250105352, 10500210704, 21000421408]

約数ペア:

[(1, 21000421408), (2, 10500210704), (4, 5250105352), (8, 2625052676), (16, 1312526338), (32, 656263169), (239, 87867872), (478, 43933936), (956, 21966968), (1912, 10983484), (3824, 5491742), (7648, 2745871), (11489, 1827872), (22978, 913936), (45956, 456968), (57121, 367648), (91912, 228484), (114242, 183824)]