21546725

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:341

約数の個数: 24

約数和(自身を含む): 27676800

約数和(自身を除く): 6130075

約数列:

[1, 5, 25, 61, 71, 199, 305, 355, 995, 1525, 1775, 4331, 4975, 12139, 14129, 21655, 60695, 70645, 108275, 303475, 353225, 861869, 4309345, 21546725]

約数ペア:

[(1, 21546725), (5, 4309345), (25, 861869), (61, 353225), (71, 303475), (199, 108275), (305, 70645), (355, 60695), (995, 21655), (1525, 14129), (1775, 12139), (4331, 4975)]