18459940

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4139}}^1$

素因数の和:4371

約数の個数: 24

約数和(自身を含む): 38949120

約数和(自身を除く): 20489180

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4139, 4460, 8278, 16556, 20695, 41390, 82780, 922997, 1845994, 3691988, 4614985, 9229970, 18459940]

約数ペア:

[(1, 18459940), (2, 9229970), (4, 4614985), (5, 3691988), (10, 1845994), (20, 922997), (223, 82780), (446, 41390), (892, 20695), (1115, 16556), (2230, 8278), (4139, 4460)]