18190720

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{661}}^1$

素因数の和:723

約数の個数: 64

約数和(自身を含む): 44565840

約数和(自身を除く): 26375120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 320, 344, 430, 640, 661, 688, 860, 1322, 1376, 1720, 2644, 2752, 3305, 3440, 5288, 5504, 6610, 6880, 10576, 13220, 13760, 21152, 26440, 27520, 28423, 42304, 52880, 56846, 84608, 105760, 113692, 142115, 211520, 227384, 284230, 423040, 454768, 568460, 909536, 1136920, 1819072, 2273840, 3638144, 4547680, 9095360, 18190720]

約数ペア:

[(1, 18190720), (2, 9095360), (4, 4547680), (5, 3638144), (8, 2273840), (10, 1819072), (16, 1136920), (20, 909536), (32, 568460), (40, 454768), (43, 423040), (64, 284230), (80, 227384), (86, 211520), (128, 142115), (160, 113692), (172, 105760), (215, 84608), (320, 56846), (344, 52880), (430, 42304), (640, 28423), (661, 27520), (688, 26440), (860, 21152), (1322, 13760), (1376, 13220), (1720, 10576), (2644, 6880), (2752, 6610), (3305, 5504), (3440, 5288)]