21135555

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{293}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 42194880

約数和(自身を除く): 21059325

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 229, 293, 315, 687, 879, 1145, 1465, 1603, 2051, 2061, 2637, 3435, 4395, 4809, 6153, 8015, 10255, 10305, 13185, 14427, 18459, 24045, 30765, 67097, 72135, 92295, 201291, 335485, 469679, 603873, 1006455, 1409037, 2348395, 3019365, 4227111, 7045185, 21135555]

約数ペア:

[(1, 21135555), (3, 7045185), (5, 4227111), (7, 3019365), (9, 2348395), (15, 1409037), (21, 1006455), (35, 603873), (45, 469679), (63, 335485), (105, 201291), (229, 92295), (293, 72135), (315, 67097), (687, 30765), (879, 24045), (1145, 18459), (1465, 14427), (1603, 13185), (2051, 10305), (2061, 10255), (2637, 8015), (3435, 6153), (4395, 4809)]