18748720

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1789}}^1$

素因数の和:1933

約数の個数: 40

約数和(自身を含む): 43948080

約数和(自身を除く): 25199360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 1789, 2096, 2620, 3578, 5240, 7156, 8945, 10480, 14312, 17890, 28624, 35780, 71560, 143120, 234359, 468718, 937436, 1171795, 1874872, 2343590, 3749744, 4687180, 9374360, 18748720]

約数ペア:

[(1, 18748720), (2, 9374360), (4, 4687180), (5, 3749744), (8, 2343590), (10, 1874872), (16, 1171795), (20, 937436), (40, 468718), (80, 234359), (131, 143120), (262, 71560), (524, 35780), (655, 28624), (1048, 17890), (1310, 14312), (1789, 10480), (2096, 8945), (2620, 7156), (3578, 5240)]