21181760

素因数分解:

$2^6\times 5^1\times {\mathrm{37}}^1\times {\mathrm{1789}}^1$

素因数の和:1843

約数の個数: 56

約数和(自身を含む): 51831240

約数和(自身を除く): 30649480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 148, 160, 185, 296, 320, 370, 592, 740, 1184, 1480, 1789, 2368, 2960, 3578, 5920, 7156, 8945, 11840, 14312, 17890, 28624, 35780, 57248, 66193, 71560, 114496, 132386, 143120, 264772, 286240, 330965, 529544, 572480, 661930, 1059088, 1323860, 2118176, 2647720, 4236352, 5295440, 10590880, 21181760]

約数ペア:

[(1, 21181760), (2, 10590880), (4, 5295440), (5, 4236352), (8, 2647720), (10, 2118176), (16, 1323860), (20, 1059088), (32, 661930), (37, 572480), (40, 529544), (64, 330965), (74, 286240), (80, 264772), (148, 143120), (160, 132386), (185, 114496), (296, 71560), (320, 66193), (370, 57248), (592, 35780), (740, 28624), (1184, 17890), (1480, 14312), (1789, 11840), (2368, 8945), (2960, 7156), (3578, 5920)]