20999896

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{293}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 43323840

約数和(自身を除く): 22323944

約数列:

[1, 2, 4, 8, 17, 31, 34, 62, 68, 124, 136, 248, 289, 293, 527, 578, 586, 1054, 1156, 1172, 2108, 2312, 2344, 4216, 4981, 8959, 9083, 9962, 17918, 18166, 19924, 35836, 36332, 39848, 71672, 72664, 84677, 154411, 169354, 308822, 338708, 617644, 677416, 1235288, 2624987, 5249974, 10499948, 20999896]

約数ペア:

[(1, 20999896), (2, 10499948), (4, 5249974), (8, 2624987), (17, 1235288), (31, 677416), (34, 617644), (62, 338708), (68, 308822), (124, 169354), (136, 154411), (248, 84677), (289, 72664), (293, 71672), (527, 39848), (578, 36332), (586, 35836), (1054, 19924), (1156, 18166), (1172, 17918), (2108, 9962), (2312, 9083), (2344, 8959), (4216, 4981)]