21645960

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{353}}^1$

素因数の和:447

約数の個数: 128

約数和(自身を含む): 75444480

約数和(自身を除く): 53798520

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 73, 84, 105, 120, 140, 146, 168, 210, 219, 280, 292, 353, 365, 420, 438, 511, 584, 706, 730, 840, 876, 1022, 1059, 1095, 1412, 1460, 1533, 1752, 1765, 2044, 2118, 2190, 2471, 2555, 2824, 2920, 3066, 3530, 4088, 4236, 4380, 4942, 5110, 5295, 6132, 7060, 7413, 7665, 8472, 8760, 9884, 10220, 10590, 12264, 12355, 14120, 14826, 15330, 19768, 20440, 21180, 24710, 25769, 29652, 30660, 37065, 42360, 49420, 51538, 59304, 61320, 74130, 77307, 98840, 103076, 128845, 148260, 154614, 180383, 206152, 257690, 296520, 309228, 360766, 386535, 515380, 541149, 618456, 721532, 773070, 901915, 1030760, 1082298, 1443064, 1546140, 1803830, 2164596, 2705745, 3092280, 3607660, 4329192, 5411490, 7215320, 10822980, 21645960]

約数ペア:

[(1, 21645960), (2, 10822980), (3, 7215320), (4, 5411490), (5, 4329192), (6, 3607660), (7, 3092280), (8, 2705745), (10, 2164596), (12, 1803830), (14, 1546140), (15, 1443064), (20, 1082298), (21, 1030760), (24, 901915), (28, 773070), (30, 721532), (35, 618456), (40, 541149), (42, 515380), (56, 386535), (60, 360766), (70, 309228), (73, 296520), (84, 257690), (105, 206152), (120, 180383), (140, 154614), (146, 148260), (168, 128845), (210, 103076), (219, 98840), (280, 77307), (292, 74130), (353, 61320), (365, 59304), (420, 51538), (438, 49420), (511, 42360), (584, 37065), (706, 30660), (730, 29652), (840, 25769), (876, 24710), (1022, 21180), (1059, 20440), (1095, 19768), (1412, 15330), (1460, 14826), (1533, 14120), (1752, 12355), (1765, 12264), (2044, 10590), (2118, 10220), (2190, 9884), (2471, 8760), (2555, 8472), (2824, 7665), (2920, 7413), (3066, 7060), (3530, 6132), (4088, 5295), (4236, 5110), (4380, 4942)]