21095440

素因数分解:

$2^4\times 5^1\times {\mathrm{167}}^1\times {\mathrm{1579}}^1$

素因数の和:1759

約数の個数: 40

約数和(自身を含む): 49371840

約数和(自身を除く): 28276400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 167, 334, 668, 835, 1336, 1579, 1670, 2672, 3158, 3340, 6316, 6680, 7895, 12632, 13360, 15790, 25264, 31580, 63160, 126320, 263693, 527386, 1054772, 1318465, 2109544, 2636930, 4219088, 5273860, 10547720, 21095440]

約数ペア:

[(1, 21095440), (2, 10547720), (4, 5273860), (5, 4219088), (8, 2636930), (10, 2109544), (16, 1318465), (20, 1054772), (40, 527386), (80, 263693), (167, 126320), (334, 63160), (668, 31580), (835, 25264), (1336, 15790), (1579, 13360), (1670, 12632), (2672, 7895), (3158, 6680), (3340, 6316)]