18405440

素因数分解:

$2^6\times 5^1\times {\mathrm{113}}^1\times {\mathrm{509}}^1$

素因数の和:639

約数の個数: 56

約数和(自身を含む): 44302680

約数和(自身を除く): 25897240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 113, 160, 226, 320, 452, 509, 565, 904, 1018, 1130, 1808, 2036, 2260, 2545, 3616, 4072, 4520, 5090, 7232, 8144, 9040, 10180, 16288, 18080, 20360, 32576, 36160, 40720, 57517, 81440, 115034, 162880, 230068, 287585, 460136, 575170, 920272, 1150340, 1840544, 2300680, 3681088, 4601360, 9202720, 18405440]

約数ペア:

[(1, 18405440), (2, 9202720), (4, 4601360), (5, 3681088), (8, 2300680), (10, 1840544), (16, 1150340), (20, 920272), (32, 575170), (40, 460136), (64, 287585), (80, 230068), (113, 162880), (160, 115034), (226, 81440), (320, 57517), (452, 40720), (509, 36160), (565, 32576), (904, 20360), (1018, 18080), (1130, 16288), (1808, 10180), (2036, 9040), (2260, 8144), (2545, 7232), (3616, 5090), (4072, 4520)]