20720505

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{1801}}^1$

素因数の和:1881

約数の個数: 32

約数和(自身を含む): 36328320

約数和(自身を除く): 15607815

約数列:

[1, 3, 5, 13, 15, 39, 59, 65, 177, 195, 295, 767, 885, 1801, 2301, 3835, 5403, 9005, 11505, 23413, 27015, 70239, 106259, 117065, 318777, 351195, 531295, 1381367, 1593885, 4144101, 6906835, 20720505]

約数ペア:

[(1, 20720505), (3, 6906835), (5, 4144101), (13, 1593885), (15, 1381367), (39, 531295), (59, 351195), (65, 318777), (177, 117065), (195, 106259), (295, 70239), (767, 27015), (885, 23413), (1801, 11505), (2301, 9005), (3835, 5403)]