21073130975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{727}}^1\times {\mathrm{89189}}^1$

素因数の和:89939

約数の個数: 24

約数和(自身を含む): 28179758880

約数和(自身を除く): 7106627905

約数列:

[1, 5, 13, 25, 65, 325, 727, 3635, 9451, 18175, 47255, 89189, 236275, 445945, 1159457, 2229725, 5797285, 28986425, 64840403, 324202015, 842925239, 1621010075, 4214626195, 21073130975]

約数ペア:

[(1, 21073130975), (5, 4214626195), (13, 1621010075), (25, 842925239), (65, 324202015), (325, 64840403), (727, 28986425), (3635, 5797285), (9451, 2229725), (18175, 1159457), (47255, 445945), (89189, 236275)]