18764720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{18043}}^1$

素因数の和:18069

約数の個数: 40

約数和(自身を含む): 46986576

約数和(自身を除く): 28221856

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 18043, 36086, 72172, 90215, 144344, 180430, 234559, 288688, 360860, 469118, 721720, 938236, 1172795, 1443440, 1876472, 2345590, 3752944, 4691180, 9382360, 18764720]

約数ペア:

[(1, 18764720), (2, 9382360), (4, 4691180), (5, 3752944), (8, 2345590), (10, 1876472), (13, 1443440), (16, 1172795), (20, 938236), (26, 721720), (40, 469118), (52, 360860), (65, 288688), (80, 234559), (104, 180430), (130, 144344), (208, 90215), (260, 72172), (520, 36086), (1040, 18043)]