21090885

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{541}}^1$

素因数の和:685

約数の個数: 32

約数和(自身を含む): 35589888

約数和(自身を除く): 14499003

約数列:

[1, 3, 5, 15, 23, 69, 113, 115, 339, 345, 541, 565, 1623, 1695, 2599, 2705, 7797, 8115, 12443, 12995, 37329, 38985, 61133, 62215, 183399, 186645, 305665, 916995, 1406059, 4218177, 7030295, 21090885]

約数ペア:

[(1, 21090885), (3, 7030295), (5, 4218177), (15, 1406059), (23, 916995), (69, 305665), (113, 186645), (115, 183399), (339, 62215), (345, 61133), (541, 38985), (565, 37329), (1623, 12995), (1695, 12443), (2599, 8115), (2705, 7797)]