390020020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{20549}}^1$

素因数の和:20644

約数の個数: 48

約数和(自身を含む): 894171600

約数和(自身を除く): 504151580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1460, 1898, 3796, 4745, 9490, 18980, 20549, 41098, 82196, 102745, 205490, 267137, 410980, 534274, 1068548, 1335685, 1500077, 2671370, 3000154, 5342740, 6000308, 7500385, 15000770, 19501001, 30001540, 39002002, 78004004, 97505005, 195010010, 390020020]

約数ペア:

[(1, 390020020), (2, 195010010), (4, 97505005), (5, 78004004), (10, 39002002), (13, 30001540), (20, 19501001), (26, 15000770), (52, 7500385), (65, 6000308), (73, 5342740), (130, 3000154), (146, 2671370), (260, 1500077), (292, 1335685), (365, 1068548), (730, 534274), (949, 410980), (1460, 267137), (1898, 205490), (3796, 102745), (4745, 82196), (9490, 41098), (18980, 20549)]