21754525

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{271}}^1$

素因数の和:326

約数の個数: 36

約数和(自身を含む): 30861120

約数和(自身を除く): 9106595

約数列:

[1, 5, 13, 19, 25, 65, 95, 169, 247, 271, 325, 475, 845, 1235, 1355, 3211, 3523, 4225, 5149, 6175, 6775, 16055, 17615, 25745, 45799, 66937, 80275, 88075, 128725, 228995, 334685, 870181, 1144975, 1673425, 4350905, 21754525]

約数ペア:

[(1, 21754525), (5, 4350905), (13, 1673425), (19, 1144975), (25, 870181), (65, 334685), (95, 228995), (169, 128725), (247, 88075), (271, 80275), (325, 66937), (475, 45799), (845, 25745), (1235, 17615), (1355, 16055), (3211, 6775), (3523, 6175), (4225, 5149)]