21607155

素因数分解:

$3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1721}}^1$

素因数の和:1769

約数の個数: 40

約数和(自身を含む): 40005504

約数和(自身を除く): 18398349

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 81, 93, 135, 155, 279, 405, 465, 837, 1395, 1721, 2511, 4185, 5163, 8605, 12555, 15489, 25815, 46467, 53351, 77445, 139401, 160053, 232335, 266755, 480159, 697005, 800265, 1440477, 2400795, 4321431, 7202385, 21607155]

約数ペア:

[(1, 21607155), (3, 7202385), (5, 4321431), (9, 2400795), (15, 1440477), (27, 800265), (31, 697005), (45, 480159), (81, 266755), (93, 232335), (135, 160053), (155, 139401), (279, 77445), (405, 53351), (465, 46467), (837, 25815), (1395, 15489), (1721, 12555), (2511, 8605), (4185, 5163)]