1999550020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{773}}^1\times {\mathrm{9949}}^1$

素因数の和:10744

約数の個数: 48

約数和(自身を含む): 4528364400

約数和(自身を除く): 2528814380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 773, 1546, 3092, 3865, 7730, 9949, 10049, 15460, 19898, 20098, 39796, 40196, 49745, 50245, 99490, 100490, 129337, 198980, 200980, 258674, 517348, 646685, 1293370, 2586740, 7690577, 15381154, 30762308, 38452885, 76905770, 99977501, 153811540, 199955002, 399910004, 499887505, 999775010, 1999550020]

約数ペア:

[(1, 1999550020), (2, 999775010), (4, 499887505), (5, 399910004), (10, 199955002), (13, 153811540), (20, 99977501), (26, 76905770), (52, 38452885), (65, 30762308), (130, 15381154), (260, 7690577), (773, 2586740), (1546, 1293370), (3092, 646685), (3865, 517348), (7730, 258674), (9949, 200980), (10049, 198980), (15460, 129337), (19898, 100490), (20098, 99490), (39796, 50245), (40196, 49745)]