21753880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31991}}^1$

素因数の和:32019

約数の個数: 32

約数和(自身を含む): 51827040

約数和(自身を除く): 30073160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31991, 63982, 127964, 159955, 255928, 319910, 543847, 639820, 1087694, 1279640, 2175388, 2719235, 4350776, 5438470, 10876940, 21753880]

約数ペア:

[(1, 21753880), (2, 10876940), (4, 5438470), (5, 4350776), (8, 2719235), (10, 2175388), (17, 1279640), (20, 1087694), (34, 639820), (40, 543847), (68, 319910), (85, 255928), (136, 159955), (170, 127964), (340, 63982), (680, 31991)]