21020595

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{193}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 34696512

約数和(自身を除く): 13675917

約数列:

[1, 3, 5, 15, 53, 137, 159, 193, 265, 411, 579, 685, 795, 965, 2055, 2895, 7261, 10229, 21783, 26441, 30687, 36305, 51145, 79323, 108915, 132205, 153435, 396615, 1401373, 4204119, 7006865, 21020595]

約数ペア:

[(1, 21020595), (3, 7006865), (5, 4204119), (15, 1401373), (53, 396615), (137, 153435), (159, 132205), (193, 108915), (265, 79323), (411, 51145), (579, 36305), (685, 30687), (795, 26441), (965, 21783), (2055, 10229), (2895, 7261)]