20781568

素因数分解:

$2^9\times {\mathrm{37}}^1\times {\mathrm{1097}}^1$

素因数の和:1152

約数の個数: 40

約数和(自身を含む): 42683652

約数和(自身を除く): 21902084

約数列:

[1, 2, 4, 8, 16, 32, 37, 64, 74, 128, 148, 256, 296, 512, 592, 1097, 1184, 2194, 2368, 4388, 4736, 8776, 9472, 17552, 18944, 35104, 40589, 70208, 81178, 140416, 162356, 280832, 324712, 561664, 649424, 1298848, 2597696, 5195392, 10390784, 20781568]

約数ペア:

[(1, 20781568), (2, 10390784), (4, 5195392), (8, 2597696), (16, 1298848), (32, 649424), (37, 561664), (64, 324712), (74, 280832), (128, 162356), (148, 140416), (256, 81178), (296, 70208), (512, 40589), (592, 35104), (1097, 18944), (1184, 17552), (2194, 9472), (2368, 8776), (4388, 4736)]