19820745

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 40814280

約数和(自身を除く): 20993535

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 89, 101, 105, 147, 245, 267, 303, 315, 441, 445, 505, 623, 707, 735, 801, 909, 1335, 1515, 1869, 2121, 2205, 3115, 3535, 4005, 4361, 4545, 4949, 5607, 6363, 8989, 9345, 10605, 13083, 14847, 21805, 24745, 26967, 28035, 31815, 39249, 44541, 44945, 62923, 65415, 74235, 80901, 134835, 188769, 196245, 222705, 314615, 404505, 440461, 566307, 943845, 1321383, 2202305, 2831535, 3964149, 6606915, 19820745]

約数ペア:

[(1, 19820745), (3, 6606915), (5, 3964149), (7, 2831535), (9, 2202305), (15, 1321383), (21, 943845), (35, 566307), (45, 440461), (49, 404505), (63, 314615), (89, 222705), (101, 196245), (105, 188769), (147, 134835), (245, 80901), (267, 74235), (303, 65415), (315, 62923), (441, 44945), (445, 44541), (505, 39249), (623, 31815), (707, 28035), (735, 26967), (801, 24745), (909, 21805), (1335, 14847), (1515, 13083), (1869, 10605), (2121, 9345), (2205, 8989), (3115, 6363), (3535, 5607), (4005, 4949), (4361, 4545)]