18659720

素因数分解:

$2^3\times 5^1\times {\mathrm{613}}^1\times {\mathrm{761}}^1$

素因数の和:1385

約数の個数: 32

約数和(自身を含む): 42108120

約数和(自身を除く): 23448400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 613, 761, 1226, 1522, 2452, 3044, 3065, 3805, 4904, 6088, 6130, 7610, 12260, 15220, 24520, 30440, 466493, 932986, 1865972, 2332465, 3731944, 4664930, 9329860, 18659720]

約数ペア:

[(1, 18659720), (2, 9329860), (4, 4664930), (5, 3731944), (8, 2332465), (10, 1865972), (20, 932986), (40, 466493), (613, 30440), (761, 24520), (1226, 15220), (1522, 12260), (2452, 7610), (3044, 6130), (3065, 6088), (3805, 4904)]