205696520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{119591}}^1$

素因数の和:119645

約数の個数: 32

約数和(自身を含む): 473584320

約数和(自身を除く): 267887800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 119591, 239182, 478364, 597955, 956728, 1195910, 2391820, 4783640, 5142413, 10284826, 20569652, 25712065, 41139304, 51424130, 102848260, 205696520]

約数ペア:

[(1, 205696520), (2, 102848260), (4, 51424130), (5, 41139304), (8, 25712065), (10, 20569652), (20, 10284826), (40, 5142413), (43, 4783640), (86, 2391820), (172, 1195910), (215, 956728), (344, 597955), (430, 478364), (860, 239182), (1720, 119591)]