21420410

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{277}}^1$

素因数の和:351

約数の個数: 64

約数和(自身を含む): 45636480

約数和(自身を除く): 24216070

約数列:

[1, 2, 5, 10, 11, 19, 22, 37, 38, 55, 74, 95, 110, 185, 190, 209, 277, 370, 407, 418, 554, 703, 814, 1045, 1385, 1406, 2035, 2090, 2770, 3047, 3515, 4070, 5263, 6094, 7030, 7733, 10249, 10526, 15235, 15466, 20498, 26315, 30470, 38665, 51245, 52630, 57893, 77330, 102490, 112739, 115786, 194731, 225478, 289465, 389462, 563695, 578930, 973655, 1127390, 1947310, 2142041, 4284082, 10710205, 21420410]

約数ペア:

[(1, 21420410), (2, 10710205), (5, 4284082), (10, 2142041), (11, 1947310), (19, 1127390), (22, 973655), (37, 578930), (38, 563695), (55, 389462), (74, 289465), (95, 225478), (110, 194731), (185, 115786), (190, 112739), (209, 102490), (277, 77330), (370, 57893), (407, 52630), (418, 51245), (554, 38665), (703, 30470), (814, 26315), (1045, 20498), (1385, 15466), (1406, 15235), (2035, 10526), (2090, 10249), (2770, 7733), (3047, 7030), (3515, 6094), (4070, 5263)]