21549125

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:266

約数の個数: 32

約数和(自身を含む): 29484000

約数和(自身を除く): 7934875

約数列:

[1, 5, 13, 25, 65, 89, 125, 149, 325, 445, 745, 1157, 1625, 1937, 2225, 3725, 5785, 9685, 11125, 13261, 18625, 28925, 48425, 66305, 144625, 172393, 242125, 331525, 861965, 1657625, 4309825, 21549125]

約数ペア:

[(1, 21549125), (5, 4309825), (13, 1657625), (25, 861965), (65, 331525), (89, 242125), (125, 172393), (149, 144625), (325, 66305), (445, 48425), (745, 28925), (1157, 18625), (1625, 13261), (1937, 11125), (2225, 9685), (3725, 5785)]