20978205

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{227}}^1$

素因数の和:397

約数の個数: 32

約数和(自身を含む): 34604928

約数和(自身を除く): 13626723

約数列:

[1, 3, 5, 15, 61, 101, 183, 227, 303, 305, 505, 681, 915, 1135, 1515, 3405, 6161, 13847, 18483, 22927, 30805, 41541, 68781, 69235, 92415, 114635, 207705, 343905, 1398547, 4195641, 6992735, 20978205]

約数ペア:

[(1, 20978205), (3, 6992735), (5, 4195641), (15, 1398547), (61, 343905), (101, 207705), (183, 114635), (227, 92415), (303, 69235), (305, 68781), (505, 41541), (681, 30805), (915, 22927), (1135, 18483), (1515, 13847), (3405, 6161)]