21856280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13327}}^1$

素因数の和:13379

約数の個数: 32

約数和(自身を含む): 50379840

約数和(自身を除く): 28523560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13327, 26654, 53308, 66635, 106616, 133270, 266540, 533080, 546407, 1092814, 2185628, 2732035, 4371256, 5464070, 10928140, 21856280]

約数ペア:

[(1, 21856280), (2, 10928140), (4, 5464070), (5, 4371256), (8, 2732035), (10, 2185628), (20, 1092814), (40, 546407), (41, 533080), (82, 266540), (164, 133270), (205, 106616), (328, 66635), (410, 53308), (820, 26654), (1640, 13327)]