20854980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{115861}}^1$

素因数の和:115876

約数の個数: 36

約数和(自身を含む): 63260652

約数和(自身を除く): 42405672

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 115861, 231722, 347583, 463444, 579305, 695166, 1042749, 1158610, 1390332, 1737915, 2085498, 2317220, 3475830, 4170996, 5213745, 6951660, 10427490, 20854980]

約数ペア:

[(1, 20854980), (2, 10427490), (3, 6951660), (4, 5213745), (5, 4170996), (6, 3475830), (9, 2317220), (10, 2085498), (12, 1737915), (15, 1390332), (18, 1158610), (20, 1042749), (30, 695166), (36, 579305), (45, 463444), (60, 347583), (90, 231722), (180, 115861)]