21290425

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{601}}^1$

素因数の和:733

約数の個数: 24

約数和(自身を含む): 28739480

約数和(自身を除く): 7449055

約数列:

[1, 5, 13, 25, 65, 109, 325, 545, 601, 1417, 2725, 3005, 7085, 7813, 15025, 35425, 39065, 65509, 195325, 327545, 851617, 1637725, 4258085, 21290425]

約数ペア:

[(1, 21290425), (5, 4258085), (13, 1637725), (25, 851617), (65, 327545), (109, 195325), (325, 65509), (545, 39065), (601, 35425), (1417, 15025), (2725, 7813), (3005, 7085)]