20078020420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{661}}^1\times {\mathrm{21391}}^1$

素因数の和:22132

約数の個数: 48

約数和(自身を含む): 42824388096

約数和(自身を除く): 22746367676

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 661, 710, 1322, 1420, 2644, 3305, 6610, 13220, 21391, 42782, 46931, 85564, 93862, 106955, 187724, 213910, 234655, 427820, 469310, 938620, 1518761, 3037522, 6075044, 7593805, 14139451, 15187610, 28278902, 30375220, 56557804, 70697255, 141394510, 282789020, 1003901021, 2007802042, 4015604084, 5019505105, 10039010210, 20078020420]

約数ペア:

[(1, 20078020420), (2, 10039010210), (4, 5019505105), (5, 4015604084), (10, 2007802042), (20, 1003901021), (71, 282789020), (142, 141394510), (284, 70697255), (355, 56557804), (661, 30375220), (710, 28278902), (1322, 15187610), (1420, 14139451), (2644, 7593805), (3305, 6075044), (6610, 3037522), (13220, 1518761), (21391, 938620), (42782, 469310), (46931, 427820), (85564, 234655), (93862, 213910), (106955, 187724)]