19812615

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{179}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 32762880

約数和(自身を除く): 12950265

約数列:

[1, 3, 5, 15, 47, 141, 157, 179, 235, 471, 537, 705, 785, 895, 2355, 2685, 7379, 8413, 22137, 25239, 28103, 36895, 42065, 84309, 110685, 126195, 140515, 421545, 1320841, 3962523, 6604205, 19812615]

約数ペア:

[(1, 19812615), (3, 6604205), (5, 3962523), (15, 1320841), (47, 421545), (141, 140515), (157, 126195), (179, 110685), (235, 84309), (471, 42065), (537, 36895), (705, 28103), (785, 25239), (895, 22137), (2355, 8413), (2685, 7379)]