257140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:88

約数の個数: 48

約数和(自身を含む): 620928

約数和(自身を除く): 363788

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 43, 46, 52, 65, 86, 92, 115, 130, 172, 215, 230, 260, 299, 430, 460, 559, 598, 860, 989, 1118, 1196, 1495, 1978, 2236, 2795, 2990, 3956, 4945, 5590, 5980, 9890, 11180, 12857, 19780, 25714, 51428, 64285, 128570, 257140]

約数ペア:

[(1, 257140), (2, 128570), (4, 64285), (5, 51428), (10, 25714), (13, 19780), (20, 12857), (23, 11180), (26, 9890), (43, 5980), (46, 5590), (52, 4945), (65, 3956), (86, 2990), (92, 2795), (115, 2236), (130, 1978), (172, 1495), (215, 1196), (230, 1118), (260, 989), (299, 860), (430, 598), (460, 559)]