31101720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19937}}^1$

素因数の和:19964

約数の個数: 64

約数和(自身を含む): 100487520

約数和(自身を除く): 69385800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 19937, 39874, 59811, 79748, 99685, 119622, 159496, 199370, 239244, 259181, 299055, 398740, 478488, 518362, 598110, 777543, 797480, 1036724, 1196220, 1295905, 1555086, 2073448, 2392440, 2591810, 3110172, 3887715, 5183620, 6220344, 7775430, 10367240, 15550860, 31101720]

約数ペア:

[(1, 31101720), (2, 15550860), (3, 10367240), (4, 7775430), (5, 6220344), (6, 5183620), (8, 3887715), (10, 3110172), (12, 2591810), (13, 2392440), (15, 2073448), (20, 1555086), (24, 1295905), (26, 1196220), (30, 1036724), (39, 797480), (40, 777543), (52, 598110), (60, 518362), (65, 478488), (78, 398740), (104, 299055), (120, 259181), (130, 239244), (156, 199370), (195, 159496), (260, 119622), (312, 99685), (390, 79748), (520, 59811), (780, 39874), (1560, 19937)]