28987880

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:314

約数の個数: 64

約数和(自身を含む): 67651200

約数和(自身を除く): 38663320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 71, 118, 142, 173, 236, 284, 295, 346, 355, 472, 568, 590, 692, 710, 865, 1180, 1384, 1420, 1730, 2360, 2840, 3460, 4189, 6920, 8378, 10207, 12283, 16756, 20414, 20945, 24566, 33512, 40828, 41890, 49132, 51035, 61415, 81656, 83780, 98264, 102070, 122830, 167560, 204140, 245660, 408280, 491320, 724697, 1449394, 2898788, 3623485, 5797576, 7246970, 14493940, 28987880]

約数ペア:

[(1, 28987880), (2, 14493940), (4, 7246970), (5, 5797576), (8, 3623485), (10, 2898788), (20, 1449394), (40, 724697), (59, 491320), (71, 408280), (118, 245660), (142, 204140), (173, 167560), (236, 122830), (284, 102070), (295, 98264), (346, 83780), (355, 81656), (472, 61415), (568, 51035), (590, 49132), (692, 41890), (710, 40828), (865, 33512), (1180, 24566), (1384, 20945), (1420, 20414), (1730, 16756), (2360, 12283), (2840, 10207), (3460, 8378), (4189, 6920)]