21000891273

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{541}}^1\times {\mathrm{3457}}^1$

素因数の和:4217

約数の個数: 32

約数和(自身を含む): 29687898240

約数和(自身を除く): 8687006967

約数列:

[1, 3, 19, 57, 197, 541, 591, 1623, 3457, 3743, 10279, 10371, 11229, 30837, 65683, 106577, 197049, 319731, 681029, 1870237, 2024963, 2043087, 5610711, 6074889, 12939551, 35534503, 38818653, 106603509, 368436689, 1105310067, 7000297091, 21000891273]

約数ペア:

[(1, 21000891273), (3, 7000297091), (19, 1105310067), (57, 368436689), (197, 106603509), (541, 38818653), (591, 35534503), (1623, 12939551), (3457, 6074889), (3743, 5610711), (10279, 2043087), (10371, 2024963), (11229, 1870237), (30837, 681029), (65683, 319731), (106577, 197049)]