21724760

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5273}}^1$

素因数の和:5387

約数の個数: 32

約数和(自身を含む): 49364640

約数和(自身を除く): 27639880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5273, 10546, 21092, 26365, 42184, 52730, 105460, 210920, 543119, 1086238, 2172476, 2715595, 4344952, 5431190, 10862380, 21724760]

約数ペア:

[(1, 21724760), (2, 10862380), (4, 5431190), (5, 4344952), (8, 2715595), (10, 2172476), (20, 1086238), (40, 543119), (103, 210920), (206, 105460), (412, 52730), (515, 42184), (824, 26365), (1030, 21092), (2060, 10546), (4120, 5273)]