20865975

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{21401}}^1$

素因数の和:21427

約数の個数: 24

約数和(自身を含む): 37153872

約数和(自身を除く): 16287897

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 195, 325, 975, 21401, 64203, 107005, 278213, 321015, 535025, 834639, 1391065, 1605075, 4173195, 6955325, 20865975]

約数ペア:

[(1, 20865975), (3, 6955325), (5, 4173195), (13, 1605075), (15, 1391065), (25, 834639), (39, 535025), (65, 321015), (75, 278213), (195, 107005), (325, 64203), (975, 21401)]