21855561

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{359}}^1$

素因数の和:605

約数の個数: 32

約数和(自身を含む): 36126720

約数和(自身を除く): 14271159

約数列:

[1, 3, 7, 13, 21, 39, 91, 223, 273, 359, 669, 1077, 1561, 2513, 2899, 4667, 4683, 7539, 8697, 14001, 20293, 32669, 60879, 80057, 98007, 240171, 560399, 1040741, 1681197, 3122223, 7285187, 21855561]

約数ペア:

[(1, 21855561), (3, 7285187), (7, 3122223), (13, 1681197), (21, 1040741), (39, 560399), (91, 240171), (223, 98007), (273, 80057), (359, 60879), (669, 32669), (1077, 20293), (1561, 14001), (2513, 8697), (2899, 7539), (4667, 4683)]