20475585

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{3889}}^1$

素因数の和:3919

約数の個数: 40

約数和(自身を含む): 39537960

約数和(自身を除く): 19062375

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 195, 351, 405, 585, 1053, 1755, 3889, 5265, 11667, 19445, 35001, 50557, 58335, 105003, 151671, 175005, 252785, 315009, 455013, 525015, 758355, 1365039, 1575045, 2275065, 4095117, 6825195, 20475585]

約数ペア:

[(1, 20475585), (3, 6825195), (5, 4095117), (9, 2275065), (13, 1575045), (15, 1365039), (27, 758355), (39, 525015), (45, 455013), (65, 315009), (81, 252785), (117, 175005), (135, 151671), (195, 105003), (351, 58335), (405, 50557), (585, 35001), (1053, 19445), (1755, 11667), (3889, 5265)]