20748915

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{251}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 18877581

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 167, 251, 495, 501, 753, 835, 1255, 1503, 1837, 2259, 2505, 2761, 3765, 5511, 7515, 8283, 9185, 11295, 13805, 16533, 24849, 27555, 41415, 41917, 82665, 124245, 125751, 209585, 377253, 461087, 628755, 1383261, 1886265, 2305435, 4149783, 6916305, 20748915]

約数ペア:

[(1, 20748915), (3, 6916305), (5, 4149783), (9, 2305435), (11, 1886265), (15, 1383261), (33, 628755), (45, 461087), (55, 377253), (99, 209585), (165, 125751), (167, 124245), (251, 82665), (495, 41917), (501, 41415), (753, 27555), (835, 24849), (1255, 16533), (1503, 13805), (1837, 11295), (2259, 9185), (2505, 8283), (2761, 7515), (3765, 5511)]