21977320

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2789}}^1$

素因数の和:2997

約数の個数: 32

約数和(自身を含む): 49717800

約数和(自身を除く): 27740480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2789, 3940, 5578, 7880, 11156, 13945, 22312, 27890, 55780, 111560, 549433, 1098866, 2197732, 2747165, 4395464, 5494330, 10988660, 21977320]

約数ペア:

[(1, 21977320), (2, 10988660), (4, 5494330), (5, 4395464), (8, 2747165), (10, 2197732), (20, 1098866), (40, 549433), (197, 111560), (394, 55780), (788, 27890), (985, 22312), (1576, 13945), (1970, 11156), (2789, 7880), (3940, 5578)]