20523825

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:263

約数の個数: 72

約数和(自身を含む): 42788928

約数和(自身を除く): 22265103

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 83, 105, 157, 175, 225, 249, 315, 415, 471, 525, 581, 747, 785, 1099, 1245, 1413, 1575, 1743, 2075, 2355, 2905, 3297, 3735, 3925, 5229, 5495, 6225, 7065, 8715, 9891, 11775, 13031, 14525, 16485, 18675, 26145, 27475, 35325, 39093, 43575, 49455, 65155, 82425, 91217, 117279, 130725, 195465, 247275, 273651, 325775, 456085, 586395, 820953, 977325, 1368255, 2280425, 2931975, 4104765, 6841275, 20523825]

約数ペア:

[(1, 20523825), (3, 6841275), (5, 4104765), (7, 2931975), (9, 2280425), (15, 1368255), (21, 977325), (25, 820953), (35, 586395), (45, 456085), (63, 325775), (75, 273651), (83, 247275), (105, 195465), (157, 130725), (175, 117279), (225, 91217), (249, 82425), (315, 65155), (415, 49455), (471, 43575), (525, 39093), (581, 35325), (747, 27475), (785, 26145), (1099, 18675), (1245, 16485), (1413, 14525), (1575, 13031), (1743, 11775), (2075, 9891), (2355, 8715), (2905, 7065), (3297, 6225), (3735, 5495), (3925, 5229)]