20210605

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{1291}}^1$

素因数の和:1428

約数の個数: 16

約数和(自身を含む): 25302528

約数和(自身を除く): 5091923

約数列:

[1, 5, 31, 101, 155, 505, 1291, 3131, 6455, 15655, 40021, 130391, 200105, 651955, 4042121, 20210605]

約数ペア:

[(1, 20210605), (5, 4042121), (31, 651955), (101, 200105), (155, 130391), (505, 40021), (1291, 15655), (3131, 6455)]