31120280

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{25097}}^1$

素因数の和:25139

約数の個数: 32

約数和(自身を含む): 72282240

約数和(自身を除く): 41161960

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 25097, 50194, 100388, 125485, 200776, 250970, 501940, 778007, 1003880, 1556014, 3112028, 3890035, 6224056, 7780070, 15560140, 31120280]

約数ペア:

[(1, 31120280), (2, 15560140), (4, 7780070), (5, 6224056), (8, 3890035), (10, 3112028), (20, 1556014), (31, 1003880), (40, 778007), (62, 501940), (124, 250970), (155, 200776), (248, 125485), (310, 100388), (620, 50194), (1240, 25097)]