21684315

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{631}}^1$

素因数の和:747

約数の個数: 32

約数和(自身を含む): 36403200

約数和(自身を除く): 14718885

約数列:

[1, 3, 5, 15, 29, 79, 87, 145, 237, 395, 435, 631, 1185, 1893, 2291, 3155, 6873, 9465, 11455, 18299, 34365, 49849, 54897, 91495, 149547, 249245, 274485, 747735, 1445621, 4336863, 7228105, 21684315]

約数ペア:

[(1, 21684315), (3, 7228105), (5, 4336863), (15, 1445621), (29, 747735), (79, 274485), (87, 249245), (145, 149547), (237, 91495), (395, 54897), (435, 49849), (631, 34365), (1185, 18299), (1893, 11455), (2291, 9465), (3155, 6873)]