21594820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6389}}^1$

素因数の和:6424

約数の個数: 36

約数和(自身を含む): 49113540

約数和(自身を除く): 27518720

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6389, 12778, 25556, 31945, 63890, 83057, 127780, 166114, 332228, 415285, 830570, 1079741, 1661140, 2159482, 4318964, 5398705, 10797410, 21594820]

約数ペア:

[(1, 21594820), (2, 10797410), (4, 5398705), (5, 4318964), (10, 2159482), (13, 1661140), (20, 1079741), (26, 830570), (52, 415285), (65, 332228), (130, 166114), (169, 127780), (260, 83057), (338, 63890), (676, 31945), (845, 25556), (1690, 12778), (3380, 6389)]