20890496

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{401}}^1$

素因数の和:463

約数の個数: 64

約数和(自身を含む): 46744560

約数和(自身を除く): 25854064

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 37, 44, 64, 74, 88, 128, 148, 176, 296, 352, 401, 407, 592, 704, 802, 814, 1184, 1408, 1604, 1628, 2368, 3208, 3256, 4411, 4736, 6416, 6512, 8822, 12832, 13024, 14837, 17644, 25664, 26048, 29674, 35288, 51328, 52096, 59348, 70576, 118696, 141152, 163207, 237392, 282304, 326414, 474784, 564608, 652828, 949568, 1305656, 1899136, 2611312, 5222624, 10445248, 20890496]

約数ペア:

[(1, 20890496), (2, 10445248), (4, 5222624), (8, 2611312), (11, 1899136), (16, 1305656), (22, 949568), (32, 652828), (37, 564608), (44, 474784), (64, 326414), (74, 282304), (88, 237392), (128, 163207), (148, 141152), (176, 118696), (296, 70576), (352, 59348), (401, 52096), (407, 51328), (592, 35288), (704, 29674), (802, 26048), (814, 25664), (1184, 17644), (1408, 14837), (1604, 13024), (1628, 12832), (2368, 8822), (3208, 6512), (3256, 6416), (4411, 4736)]