21280020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{354667}}^1$

素因数の和:354679

約数の個数: 24

約数和(自身を含む): 59584224

約数和(自身を除く): 38304204

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 354667, 709334, 1064001, 1418668, 1773335, 2128002, 3546670, 4256004, 5320005, 7093340, 10640010, 21280020]

約数ペア:

[(1, 21280020), (2, 10640010), (3, 7093340), (4, 5320005), (5, 4256004), (6, 3546670), (10, 2128002), (12, 1773335), (15, 1418668), (20, 1064001), (30, 709334), (60, 354667)]