21371020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8831}}^1$

素因数の和:8862

約数の個数: 36

約数和(自身を含む): 49335552

約数和(自身を除く): 27964532

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8831, 17662, 35324, 44155, 88310, 97141, 176620, 194282, 388564, 485705, 971410, 1068551, 1942820, 2137102, 4274204, 5342755, 10685510, 21371020]

約数ペア:

[(1, 21371020), (2, 10685510), (4, 5342755), (5, 4274204), (10, 2137102), (11, 1942820), (20, 1068551), (22, 971410), (44, 485705), (55, 388564), (110, 194282), (121, 176620), (220, 97141), (242, 88310), (484, 44155), (605, 35324), (1210, 17662), (2420, 8831)]