21660560

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3709}}^1$

素因数の和:3795

約数の個数: 40

約数和(自身を含む): 51064440

約数和(自身を除く): 29403880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3709, 5840, 7418, 14836, 18545, 29672, 37090, 59344, 74180, 148360, 270757, 296720, 541514, 1083028, 1353785, 2166056, 2707570, 4332112, 5415140, 10830280, 21660560]

約数ペア:

[(1, 21660560), (2, 10830280), (4, 5415140), (5, 4332112), (8, 2707570), (10, 2166056), (16, 1353785), (20, 1083028), (40, 541514), (73, 296720), (80, 270757), (146, 148360), (292, 74180), (365, 59344), (584, 37090), (730, 29672), (1168, 18545), (1460, 14836), (2920, 7418), (3709, 5840)]