20190980

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 43908480

約数和(自身を除く): 23717500

約数列:

[1, 2, 4, 5, 10, 20, 59, 71, 118, 142, 236, 241, 284, 295, 355, 482, 590, 710, 964, 1180, 1205, 1420, 2410, 4189, 4820, 8378, 14219, 16756, 17111, 20945, 28438, 34222, 41890, 56876, 68444, 71095, 83780, 85555, 142190, 171110, 284380, 342220, 1009549, 2019098, 4038196, 5047745, 10095490, 20190980]

約数ペア:

[(1, 20190980), (2, 10095490), (4, 5047745), (5, 4038196), (10, 2019098), (20, 1009549), (59, 342220), (71, 284380), (118, 171110), (142, 142190), (236, 85555), (241, 83780), (284, 71095), (295, 68444), (355, 56876), (482, 41890), (590, 34222), (710, 28438), (964, 20945), (1180, 17111), (1205, 16756), (1420, 14219), (2410, 8378), (4189, 4820)]