21287940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{354799}}^1$

素因数の和:354811

約数の個数: 24

約数和(自身を含む): 59606400

約数和(自身を除く): 38318460

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 354799, 709598, 1064397, 1419196, 1773995, 2128794, 3547990, 4257588, 5321985, 7095980, 10643970, 21287940]

約数ペア:

[(1, 21287940), (2, 10643970), (3, 7095980), (4, 5321985), (5, 4257588), (6, 3547990), (10, 2128794), (12, 1773995), (15, 1419196), (20, 1064397), (30, 709598), (60, 354799)]