20718855

素因数分解:

$3^3\times 5^1\times {\mathrm{167}}^1\times {\mathrm{919}}^1$

素因数の和:1100

約数の個数: 32

約数和(自身を含む): 37094400

約数和(自身を除く): 16375545

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 167, 501, 835, 919, 1503, 2505, 2757, 4509, 4595, 7515, 8271, 13785, 22545, 24813, 41355, 124065, 153473, 460419, 767365, 1381257, 2302095, 4143771, 6906285, 20718855]

約数ペア:

[(1, 20718855), (3, 6906285), (5, 4143771), (9, 2302095), (15, 1381257), (27, 767365), (45, 460419), (135, 153473), (167, 124065), (501, 41355), (835, 24813), (919, 22545), (1503, 13785), (2505, 8271), (2757, 7515), (4509, 4595)]