21473140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6353}}^1$

素因数の和:6388

約数の個数: 36

約数和(自身を含む): 48836844

約数和(自身を除く): 27363704

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6353, 12706, 25412, 31765, 63530, 82589, 127060, 165178, 330356, 412945, 825890, 1073657, 1651780, 2147314, 4294628, 5368285, 10736570, 21473140]

約数ペア:

[(1, 21473140), (2, 10736570), (4, 5368285), (5, 4294628), (10, 2147314), (13, 1651780), (20, 1073657), (26, 825890), (52, 412945), (65, 330356), (130, 165178), (169, 127060), (260, 82589), (338, 63530), (676, 31765), (845, 25412), (1690, 12706), (3380, 6353)]