21072940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21503}}^1$

素因数の和:21526

約数の個数: 36

約数和(自身を含む): 51480576

約数和(自身を除く): 30407636

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21503, 43006, 86012, 107515, 150521, 215030, 301042, 430060, 602084, 752605, 1053647, 1505210, 2107294, 3010420, 4214588, 5268235, 10536470, 21072940]

約数ペア:

[(1, 21072940), (2, 10536470), (4, 5268235), (5, 4214588), (7, 3010420), (10, 2107294), (14, 1505210), (20, 1053647), (28, 752605), (35, 602084), (49, 430060), (70, 301042), (98, 215030), (140, 150521), (196, 107515), (245, 86012), (490, 43006), (980, 21503)]