21114940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13711}}^1$

素因数の和:13738

約数の個数: 48

約数和(自身を含む): 55286784

約数和(自身を除く): 34171844

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13711, 27422, 54844, 68555, 95977, 137110, 150821, 191954, 274220, 301642, 383908, 479885, 603284, 754105, 959770, 1055747, 1508210, 1919540, 2111494, 3016420, 4222988, 5278735, 10557470, 21114940]

約数ペア:

[(1, 21114940), (2, 10557470), (4, 5278735), (5, 4222988), (7, 3016420), (10, 2111494), (11, 1919540), (14, 1508210), (20, 1055747), (22, 959770), (28, 754105), (35, 603284), (44, 479885), (55, 383908), (70, 301642), (77, 274220), (110, 191954), (140, 150821), (154, 137110), (220, 95977), (308, 68555), (385, 54844), (770, 27422), (1540, 13711)]