9781720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1447}}^1$

素因数の和:1484

約数の個数: 48

約数和(自身を含む): 23848560

約数和(自身を除く): 14066840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1447, 1690, 2894, 3380, 5788, 6760, 7235, 11576, 14470, 18811, 28940, 37622, 57880, 75244, 94055, 150488, 188110, 244543, 376220, 489086, 752440, 978172, 1222715, 1956344, 2445430, 4890860, 9781720]

約数ペア:

[(1, 9781720), (2, 4890860), (4, 2445430), (5, 1956344), (8, 1222715), (10, 978172), (13, 752440), (20, 489086), (26, 376220), (40, 244543), (52, 188110), (65, 150488), (104, 94055), (130, 75244), (169, 57880), (260, 37622), (338, 28940), (520, 18811), (676, 14470), (845, 11576), (1352, 7235), (1447, 6760), (1690, 5788), (2894, 3380)]