21719440

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{3271}}^1$

素因数の和:3367

約数の個数: 40

約数和(自身を含む): 51121728

約数和(自身を除く): 29402288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3271, 3320, 6542, 6640, 13084, 16355, 26168, 32710, 52336, 65420, 130840, 261680, 271493, 542986, 1085972, 1357465, 2171944, 2714930, 4343888, 5429860, 10859720, 21719440]

約数ペア:

[(1, 21719440), (2, 10859720), (4, 5429860), (5, 4343888), (8, 2714930), (10, 2171944), (16, 1357465), (20, 1085972), (40, 542986), (80, 271493), (83, 261680), (166, 130840), (332, 65420), (415, 52336), (664, 32710), (830, 26168), (1328, 16355), (1660, 13084), (3271, 6640), (3320, 6542)]