20005720

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{59}}^1\times {\mathrm{173}}^1$

素因数の和:257

約数の個数: 96

約数和(自身を含む): 53557200

約数和(自身を除く): 33551480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 59, 70, 98, 118, 140, 173, 196, 236, 245, 280, 295, 346, 392, 413, 472, 490, 590, 692, 826, 865, 980, 1180, 1211, 1384, 1652, 1730, 1960, 2065, 2360, 2422, 2891, 3304, 3460, 4130, 4844, 5782, 6055, 6920, 8260, 8477, 9688, 10207, 11564, 12110, 14455, 16520, 16954, 20414, 23128, 24220, 28910, 33908, 40828, 42385, 48440, 51035, 57820, 67816, 71449, 81656, 84770, 102070, 115640, 142898, 169540, 204140, 285796, 339080, 357245, 408280, 500143, 571592, 714490, 1000286, 1428980, 2000572, 2500715, 2857960, 4001144, 5001430, 10002860, 20005720]

約数ペア:

[(1, 20005720), (2, 10002860), (4, 5001430), (5, 4001144), (7, 2857960), (8, 2500715), (10, 2000572), (14, 1428980), (20, 1000286), (28, 714490), (35, 571592), (40, 500143), (49, 408280), (56, 357245), (59, 339080), (70, 285796), (98, 204140), (118, 169540), (140, 142898), (173, 115640), (196, 102070), (236, 84770), (245, 81656), (280, 71449), (295, 67816), (346, 57820), (392, 51035), (413, 48440), (472, 42385), (490, 40828), (590, 33908), (692, 28910), (826, 24220), (865, 23128), (980, 20414), (1180, 16954), (1211, 16520), (1384, 14455), (1652, 12110), (1730, 11564), (1960, 10207), (2065, 9688), (2360, 8477), (2422, 8260), (2891, 6920), (3304, 6055), (3460, 5782), (4130, 4844)]