28259725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{977}}^1$

素因数の和:1089

約数の個数: 24

約数和(自身を含む): 38200680

約数和(自身を除く): 9940955

約数列:

[1, 5, 13, 25, 65, 89, 325, 445, 977, 1157, 2225, 4885, 5785, 12701, 24425, 28925, 63505, 86953, 317525, 434765, 1130389, 2173825, 5651945, 28259725]

約数ペア:

[(1, 28259725), (5, 5651945), (13, 2173825), (25, 1130389), (65, 434765), (89, 317525), (325, 86953), (445, 63505), (977, 28925), (1157, 24425), (2225, 12701), (4885, 5785)]