20901425

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{557}}^1$

素因数の和:665

約数の個数: 24

約数和(自身を含む): 27676800

約数和(自身を除く): 6775375

約数列:

[1, 5, 19, 25, 79, 95, 395, 475, 557, 1501, 1975, 2785, 7505, 10583, 13925, 37525, 44003, 52915, 220015, 264575, 836057, 1100075, 4180285, 20901425]

約数ペア:

[(1, 20901425), (5, 4180285), (19, 1100075), (25, 836057), (79, 264575), (95, 220015), (395, 52915), (475, 44003), (557, 37525), (1501, 13925), (1975, 10583), (2785, 7505)]