21678485

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 29007072

約数和(自身を除く): 7328587

約数列:

[1, 5, 17, 37, 61, 85, 113, 185, 305, 565, 629, 1037, 1921, 2257, 3145, 4181, 5185, 6893, 9605, 11285, 20905, 34465, 38369, 71077, 117181, 191845, 255041, 355385, 585905, 1275205, 4335697, 21678485]

約数ペア:

[(1, 21678485), (5, 4335697), (17, 1275205), (37, 585905), (61, 355385), (85, 255041), (113, 191845), (185, 117181), (305, 71077), (565, 38369), (629, 34465), (1037, 20905), (1921, 11285), (2257, 9605), (3145, 6893), (4181, 5185)]