20455520

素因数分解:

$2^5\times 5^1\times {\mathrm{173}}^1\times {\mathrm{739}}^1$

素因数の和:927

約数の個数: 48

約数和(自身を含む): 48671280

約数和(自身を除く): 28215760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 173, 346, 692, 739, 865, 1384, 1478, 1730, 2768, 2956, 3460, 3695, 5536, 5912, 6920, 7390, 11824, 13840, 14780, 23648, 27680, 29560, 59120, 118240, 127847, 255694, 511388, 639235, 1022776, 1278470, 2045552, 2556940, 4091104, 5113880, 10227760, 20455520]

約数ペア:

[(1, 20455520), (2, 10227760), (4, 5113880), (5, 4091104), (8, 2556940), (10, 2045552), (16, 1278470), (20, 1022776), (32, 639235), (40, 511388), (80, 255694), (160, 127847), (173, 118240), (346, 59120), (692, 29560), (739, 27680), (865, 23648), (1384, 14780), (1478, 13840), (1730, 11824), (2768, 7390), (2956, 6920), (3460, 5912), (3695, 5536)]