18705820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2521}}^1$

素因数の和:2590

約数の個数: 48

約数和(自身を含む): 45759168

約数和(自身を除く): 27053348

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 53, 70, 106, 140, 212, 265, 371, 530, 742, 1060, 1484, 1855, 2521, 3710, 5042, 7420, 10084, 12605, 17647, 25210, 35294, 50420, 70588, 88235, 133613, 176470, 267226, 352940, 534452, 668065, 935291, 1336130, 1870582, 2672260, 3741164, 4676455, 9352910, 18705820]

約数ペア:

[(1, 18705820), (2, 9352910), (4, 4676455), (5, 3741164), (7, 2672260), (10, 1870582), (14, 1336130), (20, 935291), (28, 668065), (35, 534452), (53, 352940), (70, 267226), (106, 176470), (140, 133613), (212, 88235), (265, 70588), (371, 50420), (530, 35294), (742, 25210), (1060, 17647), (1484, 12605), (1855, 10084), (2521, 7420), (3710, 5042)]