21138440

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6367}}^1$

素因数の和:6461

約数の個数: 32

約数和(自身を含む): 48142080

約数和(自身を除く): 27003640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6367, 12734, 25468, 31835, 50936, 63670, 127340, 254680, 528461, 1056922, 2113844, 2642305, 4227688, 5284610, 10569220, 21138440]

約数ペア:

[(1, 21138440), (2, 10569220), (4, 5284610), (5, 4227688), (8, 2642305), (10, 2113844), (20, 1056922), (40, 528461), (83, 254680), (166, 127340), (332, 63670), (415, 50936), (664, 31835), (830, 25468), (1660, 12734), (3320, 6367)]