19990100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{15377}}^1$

素因数の和:15404

約数の個数: 36

約数和(自身を含む): 46718364

約数和(自身を除く): 26728264

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 15377, 30754, 61508, 76885, 153770, 199901, 307540, 384425, 399802, 768850, 799604, 999505, 1537700, 1999010, 3998020, 4997525, 9995050, 19990100]

約数ペア:

[(1, 19990100), (2, 9995050), (4, 4997525), (5, 3998020), (10, 1999010), (13, 1537700), (20, 999505), (25, 799604), (26, 768850), (50, 399802), (52, 384425), (65, 307540), (100, 199901), (130, 153770), (260, 76885), (325, 61508), (650, 30754), (1300, 15377)]