20177725

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{241}}^1$

素因数の和:465

約数の個数: 24

約数和(自身を含む): 26737128

約数和(自身を除く): 6559403

約数列:

[1, 5, 17, 25, 85, 197, 241, 425, 985, 1205, 3349, 4097, 4925, 6025, 16745, 20485, 47477, 83725, 102425, 237385, 807109, 1186925, 4035545, 20177725]

約数ペア:

[(1, 20177725), (5, 4035545), (17, 1186925), (25, 807109), (85, 237385), (197, 102425), (241, 83725), (425, 47477), (985, 20485), (1205, 16745), (3349, 6025), (4097, 4925)]