21711820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{739}}^1$

素因数の和:874

約数の個数: 48

約数和(自身を含む): 49603680

約数和(自身を除く): 27891860

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 113, 130, 226, 260, 452, 565, 739, 1130, 1469, 1478, 2260, 2938, 2956, 3695, 5876, 7345, 7390, 9607, 14690, 14780, 19214, 29380, 38428, 48035, 83507, 96070, 167014, 192140, 334028, 417535, 835070, 1085591, 1670140, 2171182, 4342364, 5427955, 10855910, 21711820]

約数ペア:

[(1, 21711820), (2, 10855910), (4, 5427955), (5, 4342364), (10, 2171182), (13, 1670140), (20, 1085591), (26, 835070), (52, 417535), (65, 334028), (113, 192140), (130, 167014), (226, 96070), (260, 83507), (452, 48035), (565, 38428), (739, 29380), (1130, 19214), (1469, 14780), (1478, 14690), (2260, 9607), (2938, 7390), (2956, 7345), (3695, 5876)]