20725515

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{179}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 17014005

約数列:

[1, 3, 5, 9, 15, 31, 45, 83, 93, 155, 179, 249, 279, 415, 465, 537, 747, 895, 1245, 1395, 1611, 2573, 2685, 3735, 5549, 7719, 8055, 12865, 14857, 16647, 23157, 27745, 38595, 44571, 49941, 74285, 83235, 115785, 133713, 222855, 249705, 460567, 668565, 1381701, 2302835, 4145103, 6908505, 20725515]

約数ペア:

[(1, 20725515), (3, 6908505), (5, 4145103), (9, 2302835), (15, 1381701), (31, 668565), (45, 460567), (83, 249705), (93, 222855), (155, 133713), (179, 115785), (249, 83235), (279, 74285), (415, 49941), (465, 44571), (537, 38595), (747, 27745), (895, 23157), (1245, 16647), (1395, 14857), (1611, 12865), (2573, 8055), (2685, 7719), (3735, 5549)]