18690920

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{173}}^1$

素因数の和:294

約数の個数: 64

約数和(自身を含む): 44035920

約数和(自身を除く): 25345000

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 73, 74, 146, 148, 173, 185, 292, 296, 346, 365, 370, 584, 692, 730, 740, 865, 1384, 1460, 1480, 1730, 2701, 2920, 3460, 5402, 6401, 6920, 10804, 12629, 12802, 13505, 21608, 25258, 25604, 27010, 32005, 50516, 51208, 54020, 63145, 64010, 101032, 108040, 126290, 128020, 252580, 256040, 467273, 505160, 934546, 1869092, 2336365, 3738184, 4672730, 9345460, 18690920]

約数ペア:

[(1, 18690920), (2, 9345460), (4, 4672730), (5, 3738184), (8, 2336365), (10, 1869092), (20, 934546), (37, 505160), (40, 467273), (73, 256040), (74, 252580), (146, 128020), (148, 126290), (173, 108040), (185, 101032), (292, 64010), (296, 63145), (346, 54020), (365, 51208), (370, 50516), (584, 32005), (692, 27010), (730, 25604), (740, 25258), (865, 21608), (1384, 13505), (1460, 12802), (1480, 12629), (1730, 10804), (2701, 6920), (2920, 6401), (3460, 5402)]