81400810

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1\times {\mathrm{617}}^1$

素因数の和:870

約数の個数: 32

約数和(自身を含む): 149506560

約数和(自身を除く): 68105750

約数列:

[1, 2, 5, 10, 79, 158, 167, 334, 395, 617, 790, 835, 1234, 1670, 3085, 6170, 13193, 26386, 48743, 65965, 97486, 103039, 131930, 206078, 243715, 487430, 515195, 1030390, 8140081, 16280162, 40700405, 81400810]

約数ペア:

[(1, 81400810), (2, 40700405), (5, 16280162), (10, 8140081), (79, 1030390), (158, 515195), (167, 487430), (334, 243715), (395, 206078), (617, 131930), (790, 103039), (835, 97486), (1234, 65965), (1670, 48743), (3085, 26386), (6170, 13193)]