21264688

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78179}}^1$

素因数の和:78204

約数の個数: 20

約数和(自身を含む): 43624440

約数和(自身を除く): 22359752

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78179, 156358, 312716, 625432, 1250864, 1329043, 2658086, 5316172, 10632344, 21264688]

約数ペア:

[(1, 21264688), (2, 10632344), (4, 5316172), (8, 2658086), (16, 1329043), (17, 1250864), (34, 625432), (68, 312716), (136, 156358), (272, 78179)]