20500640

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7537}}^1$

素因数の和:7569

約数の個数: 48

約数和(自身を含む): 51288552

約数和(自身を除く): 30787912

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7537, 15074, 30148, 37685, 60296, 75370, 120592, 128129, 150740, 241184, 256258, 301480, 512516, 602960, 640645, 1025032, 1205920, 1281290, 2050064, 2562580, 4100128, 5125160, 10250320, 20500640]

約数ペア:

[(1, 20500640), (2, 10250320), (4, 5125160), (5, 4100128), (8, 2562580), (10, 2050064), (16, 1281290), (17, 1205920), (20, 1025032), (32, 640645), (34, 602960), (40, 512516), (68, 301480), (80, 256258), (85, 241184), (136, 150740), (160, 128129), (170, 120592), (272, 75370), (340, 60296), (544, 37685), (680, 30148), (1360, 15074), (2720, 7537)]