21085712

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77521}}^1$

素因数の和:77546

約数の個数: 20

約数和(自身を含む): 43257276

約数和(自身を除く): 22171564

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77521, 155042, 310084, 620168, 1240336, 1317857, 2635714, 5271428, 10542856, 21085712]

約数ペア:

[(1, 21085712), (2, 10542856), (4, 5271428), (8, 2635714), (16, 1317857), (17, 1240336), (34, 620168), (68, 310084), (136, 155042), (272, 77521)]