81621800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31393}}^1$

素因数の和:31422

約数の個数: 48

約数和(自身を含む): 204374940

約数和(自身を除く): 122753140

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 31393, 62786, 125572, 156965, 251144, 313930, 408109, 627860, 784825, 816218, 1255720, 1569650, 1632436, 2040545, 3139300, 3264872, 4081090, 6278600, 8162180, 10202725, 16324360, 20405450, 40810900, 81621800]

約数ペア:

[(1, 81621800), (2, 40810900), (4, 20405450), (5, 16324360), (8, 10202725), (10, 8162180), (13, 6278600), (20, 4081090), (25, 3264872), (26, 3139300), (40, 2040545), (50, 1632436), (52, 1569650), (65, 1255720), (100, 816218), (104, 784825), (130, 627860), (200, 408109), (260, 313930), (325, 251144), (520, 156965), (650, 125572), (1300, 62786), (2600, 31393)]