20281208

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:204

約数の個数: 64

約数和(自身を含む): 42768000

約数和(自身を除く): 22486792

約数列:

[1, 2, 4, 8, 19, 29, 38, 43, 58, 76, 86, 107, 116, 152, 172, 214, 232, 344, 428, 551, 817, 856, 1102, 1247, 1634, 2033, 2204, 2494, 3103, 3268, 4066, 4408, 4601, 4988, 6206, 6536, 8132, 9202, 9976, 12412, 16264, 18404, 23693, 24824, 36808, 47386, 58957, 87419, 94772, 117914, 133429, 174838, 189544, 235828, 266858, 349676, 471656, 533716, 699352, 1067432, 2535151, 5070302, 10140604, 20281208]

約数ペア:

[(1, 20281208), (2, 10140604), (4, 5070302), (8, 2535151), (19, 1067432), (29, 699352), (38, 533716), (43, 471656), (58, 349676), (76, 266858), (86, 235828), (107, 189544), (116, 174838), (152, 133429), (172, 117914), (214, 94772), (232, 87419), (344, 58957), (428, 47386), (551, 36808), (817, 24824), (856, 23693), (1102, 18404), (1247, 16264), (1634, 12412), (2033, 9976), (2204, 9202), (2494, 8132), (3103, 6536), (3268, 6206), (4066, 4988), (4408, 4601)]