21188860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13759}}^1$

素因数の和:13786

約数の個数: 48

約数和(自身を含む): 55480320

約数和(自身を除く): 34291460

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, 13759, 27518, 55036, 68795, 96313, 137590, 151349, 192626, 275180, 302698, 385252, 481565, 605396, 756745, 963130, 1059443, 1513490, 1926260, 2118886, 3026980, 4237772, 5297215, 10594430, 21188860]

約数ペア:

[(1, 21188860), (2, 10594430), (4, 5297215), (5, 4237772), (7, 3026980), (10, 2118886), (11, 1926260), (14, 1513490), (20, 1059443), (22, 963130), (28, 756745), (35, 605396), (44, 481565), (55, 385252), (70, 302698), (77, 275180), (110, 192626), (140, 151349), (154, 137590), (220, 96313), (308, 68795), (385, 55036), (770, 27518), (1540, 13759)]