21087405

素因数分解:

$3^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{863}}^1$

素因数の和:1058

約数の個数: 32

約数和(自身を含む): 37739520

約数和(自身を除く): 16652115

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 181, 543, 863, 905, 1629, 2589, 2715, 4315, 4887, 7767, 8145, 12945, 23301, 24435, 38835, 116505, 156203, 468609, 781015, 1405827, 2343045, 4217481, 7029135, 21087405]

約数ペア:

[(1, 21087405), (3, 7029135), (5, 4217481), (9, 2343045), (15, 1405827), (27, 781015), (45, 468609), (135, 156203), (181, 116505), (543, 38835), (863, 24435), (905, 23301), (1629, 12945), (2589, 8145), (2715, 7767), (4315, 4887)]