20920319

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 26873856

約数和(自身を除く): 5953537

約数列:

[1, 7, 17, 31, 53, 107, 119, 217, 371, 527, 749, 901, 1643, 1819, 3317, 3689, 5671, 6307, 11501, 12733, 23219, 27931, 39697, 56389, 96407, 175801, 195517, 394723, 674849, 1230607, 2988617, 20920319]

約数ペア:

[(1, 20920319), (7, 2988617), (17, 1230607), (31, 674849), (53, 394723), (107, 195517), (119, 175801), (217, 96407), (371, 56389), (527, 39697), (749, 27931), (901, 23219), (1643, 12733), (1819, 11501), (3317, 6307), (3689, 5671)]