16665680

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{5081}}^1$

素因数の和:5135

約数の個数: 40

約数和(自身を含む): 39700584

約数和(自身を除く): 23034904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 5081, 10162, 20324, 25405, 40648, 50810, 81296, 101620, 203240, 208321, 406480, 416642, 833284, 1041605, 1666568, 2083210, 3333136, 4166420, 8332840, 16665680]

約数ペア:

[(1, 16665680), (2, 8332840), (4, 4166420), (5, 3333136), (8, 2083210), (10, 1666568), (16, 1041605), (20, 833284), (40, 416642), (41, 406480), (80, 208321), (82, 203240), (164, 101620), (205, 81296), (328, 50810), (410, 40648), (656, 25405), (820, 20324), (1640, 10162), (3280, 5081)]