640328

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{131}}^1$

素因数の和:197

約数の個数: 32

約数和(自身を含む): 1330560

約数和(自身を除く): 690232

約数列:

[1, 2, 4, 8, 13, 26, 47, 52, 94, 104, 131, 188, 262, 376, 524, 611, 1048, 1222, 1703, 2444, 3406, 4888, 6157, 6812, 12314, 13624, 24628, 49256, 80041, 160082, 320164, 640328]

約数ペア:

[(1, 640328), (2, 320164), (4, 160082), (8, 80041), (13, 49256), (26, 24628), (47, 13624), (52, 12314), (94, 6812), (104, 6157), (131, 4888), (188, 3406), (262, 2444), (376, 1703), (524, 1222), (611, 1048)]