28081720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{17123}}^1$

素因数の和:17175

約数の個数: 32

約数和(自身を含む): 64728720

約数和(自身を除く): 36647000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 17123, 34246, 68492, 85615, 136984, 171230, 342460, 684920, 702043, 1404086, 2808172, 3510215, 5616344, 7020430, 14040860, 28081720]

約数ペア:

[(1, 28081720), (2, 14040860), (4, 7020430), (5, 5616344), (8, 3510215), (10, 2808172), (20, 1404086), (40, 702043), (41, 684920), (82, 342460), (164, 171230), (205, 136984), (328, 85615), (410, 68492), (820, 34246), (1640, 17123)]