17920220

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{163}}^1\times {\mathrm{239}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 39674880

約数和(自身を除く): 21754660

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 163, 230, 239, 326, 460, 478, 652, 815, 956, 1195, 1630, 2390, 3260, 3749, 4780, 5497, 7498, 10994, 14996, 18745, 21988, 27485, 37490, 38957, 54970, 74980, 77914, 109940, 155828, 194785, 389570, 779140, 896011, 1792022, 3584044, 4480055, 8960110, 17920220]

約数ペア:

[(1, 17920220), (2, 8960110), (4, 4480055), (5, 3584044), (10, 1792022), (20, 896011), (23, 779140), (46, 389570), (92, 194785), (115, 155828), (163, 109940), (230, 77914), (239, 74980), (326, 54970), (460, 38957), (478, 37490), (652, 27485), (815, 21988), (956, 18745), (1195, 14996), (1630, 10994), (2390, 7498), (3260, 5497), (3749, 4780)]