21611728

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{991}}^1$

素因数の和:1075

約数の個数: 40

約数和(自身を含む): 44282880

約数和(自身を除く): 22671152

約数列:

[1, 2, 4, 8, 16, 29, 47, 58, 94, 116, 188, 232, 376, 464, 752, 991, 1363, 1982, 2726, 3964, 5452, 7928, 10904, 15856, 21808, 28739, 46577, 57478, 93154, 114956, 186308, 229912, 372616, 459824, 745232, 1350733, 2701466, 5402932, 10805864, 21611728]

約数ペア:

[(1, 21611728), (2, 10805864), (4, 5402932), (8, 2701466), (16, 1350733), (29, 745232), (47, 459824), (58, 372616), (94, 229912), (116, 186308), (188, 114956), (232, 93154), (376, 57478), (464, 46577), (752, 28739), (991, 21808), (1363, 15856), (1982, 10904), (2726, 7928), (3964, 5452)]