18209740

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{419}}^1$

素因数の和:522

約数の個数: 48

約数和(自身を含む): 40007520

約数和(自身を除く): 21797780

約数列:

[1, 2, 4, 5, 10, 20, 41, 53, 82, 106, 164, 205, 212, 265, 410, 419, 530, 820, 838, 1060, 1676, 2095, 2173, 4190, 4346, 8380, 8692, 10865, 17179, 21730, 22207, 34358, 43460, 44414, 68716, 85895, 88828, 111035, 171790, 222070, 343580, 444140, 910487, 1820974, 3641948, 4552435, 9104870, 18209740]

約数ペア:

[(1, 18209740), (2, 9104870), (4, 4552435), (5, 3641948), (10, 1820974), (20, 910487), (41, 444140), (53, 343580), (82, 222070), (106, 171790), (164, 111035), (205, 88828), (212, 85895), (265, 68716), (410, 44414), (419, 43460), (530, 34358), (820, 22207), (838, 21730), (1060, 17179), (1676, 10865), (2095, 8692), (2173, 8380), (4190, 4346)]