20885072

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:172

約数の個数: 80

約数和(自身を含む): 46663680

約数和(自身を除く): 25778608

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 41, 52, 62, 79, 82, 104, 124, 158, 164, 208, 248, 316, 328, 403, 496, 533, 632, 656, 806, 1027, 1066, 1264, 1271, 1612, 2054, 2132, 2449, 2542, 3224, 3239, 4108, 4264, 4898, 5084, 6448, 6478, 8216, 8528, 9796, 10168, 12956, 16432, 16523, 19592, 20336, 25912, 31837, 33046, 39184, 42107, 51824, 63674, 66092, 84214, 100409, 127348, 132184, 168428, 200818, 254696, 264368, 336856, 401636, 509392, 673712, 803272, 1305317, 1606544, 2610634, 5221268, 10442536, 20885072]

約数ペア:

[(1, 20885072), (2, 10442536), (4, 5221268), (8, 2610634), (13, 1606544), (16, 1305317), (26, 803272), (31, 673712), (41, 509392), (52, 401636), (62, 336856), (79, 264368), (82, 254696), (104, 200818), (124, 168428), (158, 132184), (164, 127348), (208, 100409), (248, 84214), (316, 66092), (328, 63674), (403, 51824), (496, 42107), (533, 39184), (632, 33046), (656, 31837), (806, 25912), (1027, 20336), (1066, 19592), (1264, 16523), (1271, 16432), (1612, 12956), (2054, 10168), (2132, 9796), (2449, 8528), (2542, 8216), (3224, 6478), (3239, 6448), (4108, 5084), (4264, 4898)]