20931825

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 37507520

約数和(自身を除く): 16575695

約数列:

[1, 3, 5, 15, 19, 25, 37, 57, 75, 95, 111, 185, 285, 397, 475, 555, 703, 925, 1191, 1425, 1985, 2109, 2775, 3515, 5955, 7543, 9925, 10545, 14689, 17575, 22629, 29775, 37715, 44067, 52725, 73445, 113145, 188575, 220335, 279091, 367225, 565725, 837273, 1101675, 1395455, 4186365, 6977275, 20931825]

約数ペア:

[(1, 20931825), (3, 6977275), (5, 4186365), (15, 1395455), (19, 1101675), (25, 837273), (37, 565725), (57, 367225), (75, 279091), (95, 220335), (111, 188575), (185, 113145), (285, 73445), (397, 52725), (475, 44067), (555, 37715), (703, 29775), (925, 22629), (1191, 17575), (1425, 14689), (1985, 10545), (2109, 9925), (2775, 7543), (3515, 5955)]