21329840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{929}}^1$

素因数の和:990

約数の個数: 80

約数和(自身を含む): 58121280

約数和(自身を除く): 36791440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 41, 56, 70, 80, 82, 112, 140, 164, 205, 280, 287, 328, 410, 560, 574, 656, 820, 929, 1148, 1435, 1640, 1858, 2296, 2870, 3280, 3716, 4592, 4645, 5740, 6503, 7432, 9290, 11480, 13006, 14864, 18580, 22960, 26012, 32515, 37160, 38089, 52024, 65030, 74320, 76178, 104048, 130060, 152356, 190445, 260120, 266623, 304712, 380890, 520240, 533246, 609424, 761780, 1066492, 1333115, 1523560, 2132984, 2666230, 3047120, 4265968, 5332460, 10664920, 21329840]

約数ペア:

[(1, 21329840), (2, 10664920), (4, 5332460), (5, 4265968), (7, 3047120), (8, 2666230), (10, 2132984), (14, 1523560), (16, 1333115), (20, 1066492), (28, 761780), (35, 609424), (40, 533246), (41, 520240), (56, 380890), (70, 304712), (80, 266623), (82, 260120), (112, 190445), (140, 152356), (164, 130060), (205, 104048), (280, 76178), (287, 74320), (328, 65030), (410, 52024), (560, 38089), (574, 37160), (656, 32515), (820, 26012), (929, 22960), (1148, 18580), (1435, 14864), (1640, 13006), (1858, 11480), (2296, 9290), (2870, 7432), (3280, 6503), (3716, 5740), (4592, 4645)]