18864720005

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{1995211}}^1$

素因数の和:1995308

約数の個数: 16

約数和(自身を含む): 23751003648

約数和(自身を除く): 4886283643

約数列:

[1, 5, 31, 61, 155, 305, 1891, 9455, 1995211, 9976055, 61851541, 121707871, 309257705, 608539355, 3772944001, 18864720005]

約数ペア:

[(1, 18864720005), (5, 3772944001), (31, 608539355), (61, 309257705), (155, 121707871), (305, 61851541), (1891, 9976055), (9455, 1995211)]