20441680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{211}}^1$

素因数の和:404

約数の個数: 80

約数和(自身を含む): 54889344

約数和(自身を除く): 34447664

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 173, 211, 280, 346, 422, 560, 692, 844, 865, 1055, 1211, 1384, 1477, 1688, 1730, 2110, 2422, 2768, 2954, 3376, 3460, 4220, 4844, 5908, 6055, 6920, 7385, 8440, 9688, 11816, 12110, 13840, 14770, 16880, 19376, 23632, 24220, 29540, 36503, 48440, 59080, 73006, 96880, 118160, 146012, 182515, 255521, 292024, 365030, 511042, 584048, 730060, 1022084, 1277605, 1460120, 2044168, 2555210, 2920240, 4088336, 5110420, 10220840, 20441680]

約数ペア:

[(1, 20441680), (2, 10220840), (4, 5110420), (5, 4088336), (7, 2920240), (8, 2555210), (10, 2044168), (14, 1460120), (16, 1277605), (20, 1022084), (28, 730060), (35, 584048), (40, 511042), (56, 365030), (70, 292024), (80, 255521), (112, 182515), (140, 146012), (173, 118160), (211, 96880), (280, 73006), (346, 59080), (422, 48440), (560, 36503), (692, 29540), (844, 24220), (865, 23632), (1055, 19376), (1211, 16880), (1384, 14770), (1477, 13840), (1688, 12110), (1730, 11816), (2110, 9688), (2422, 8440), (2768, 7385), (2954, 6920), (3376, 6055), (3460, 5908), (4220, 4844)]