19981075

素因数分解:

$5^2\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:307

約数の個数: 24

約数和(自身を含む): 25633280

約数和(自身を除く): 5652205

約数列:

[1, 5, 25, 67, 79, 151, 335, 395, 755, 1675, 1975, 3775, 5293, 10117, 11929, 26465, 50585, 59645, 132325, 252925, 298225, 799243, 3996215, 19981075]

約数ペア:

[(1, 19981075), (5, 3996215), (25, 799243), (67, 298225), (79, 252925), (151, 132325), (335, 59645), (395, 50585), (755, 26465), (1675, 11929), (1975, 10117), (3775, 5293)]