20181340

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{241}}^1$

素因数の和:382

約数の個数: 48

約数和(自身を含む): 43908480

約数和(自身を除く): 23727140

約数列:

[1, 2, 4, 5, 10, 20, 53, 79, 106, 158, 212, 241, 265, 316, 395, 482, 530, 790, 964, 1060, 1205, 1580, 2410, 4187, 4820, 8374, 12773, 16748, 19039, 20935, 25546, 38078, 41870, 51092, 63865, 76156, 83740, 95195, 127730, 190390, 255460, 380780, 1009067, 2018134, 4036268, 5045335, 10090670, 20181340]

約数ペア:

[(1, 20181340), (2, 10090670), (4, 5045335), (5, 4036268), (10, 2018134), (20, 1009067), (53, 380780), (79, 255460), (106, 190390), (158, 127730), (212, 95195), (241, 83740), (265, 76156), (316, 63865), (395, 51092), (482, 41870), (530, 38078), (790, 25546), (964, 20935), (1060, 19039), (1205, 16748), (1580, 12773), (2410, 8374), (4187, 4820)]