21135855

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{283}}^1\times {\mathrm{383}}^1$

素因数の和:687

約数の個数: 32

約数和(自身を含む): 36642816

約数和(自身を除く): 15506961

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 283, 383, 849, 1149, 1415, 1915, 3679, 4245, 4979, 5745, 11037, 14937, 18395, 24895, 55185, 74685, 108389, 325167, 541945, 1409057, 1625835, 4227171, 7045285, 21135855]

約数ペア:

[(1, 21135855), (3, 7045285), (5, 4227171), (13, 1625835), (15, 1409057), (39, 541945), (65, 325167), (195, 108389), (283, 74685), (383, 55185), (849, 24895), (1149, 18395), (1415, 14937), (1915, 11037), (3679, 5745), (4245, 4979)]