18391840

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1619}}^1$

素因数の和:1705

約数の個数: 48

約数和(自身を含む): 44089920

約数和(自身を除く): 25698080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1619, 2272, 2840, 3238, 5680, 6476, 8095, 11360, 12952, 16190, 25904, 32380, 51808, 64760, 114949, 129520, 229898, 259040, 459796, 574745, 919592, 1149490, 1839184, 2298980, 3678368, 4597960, 9195920, 18391840]

約数ペア:

[(1, 18391840), (2, 9195920), (4, 4597960), (5, 3678368), (8, 2298980), (10, 1839184), (16, 1149490), (20, 919592), (32, 574745), (40, 459796), (71, 259040), (80, 229898), (142, 129520), (160, 114949), (284, 64760), (355, 51808), (568, 32380), (710, 25904), (1136, 16190), (1420, 12952), (1619, 11360), (2272, 8095), (2840, 6476), (3238, 5680)]