19189990

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1\times {\mathrm{193}}^1$

素因数の和:424

約数の個数: 32

約数和(自身を含む): 35506656

約数和(自身を除く): 16316666

約数列:

[1, 2, 5, 10, 61, 122, 163, 193, 305, 326, 386, 610, 815, 965, 1630, 1930, 9943, 11773, 19886, 23546, 31459, 49715, 58865, 62918, 99430, 117730, 157295, 314590, 1918999, 3837998, 9594995, 19189990]

約数ペア:

[(1, 19189990), (2, 9594995), (5, 3837998), (10, 1918999), (61, 314590), (122, 157295), (163, 117730), (193, 99430), (305, 62918), (326, 58865), (386, 49715), (610, 31459), (815, 23546), (965, 19886), (1630, 11773), (1930, 9943)]