21493420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6359}}^1$

素因数の和:6394

約数の個数: 36

約数和(自身を含む): 48882960

約数和(自身を除く): 27389540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6359, 12718, 25436, 31795, 63590, 82667, 127180, 165334, 330668, 413335, 826670, 1074671, 1653340, 2149342, 4298684, 5373355, 10746710, 21493420]

約数ペア:

[(1, 21493420), (2, 10746710), (4, 5373355), (5, 4298684), (10, 2149342), (13, 1653340), (20, 1074671), (26, 826670), (52, 413335), (65, 330668), (130, 165334), (169, 127180), (260, 82667), (338, 63590), (676, 31795), (845, 25436), (1690, 12718), (3380, 6359)]