81608840

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{2791}}^1$

素因数の和:2862

約数の個数: 64

約数和(自身を含む): 199013760

約数和(自身を除く): 117404920

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 43, 68, 85, 86, 136, 170, 172, 215, 340, 344, 430, 680, 731, 860, 1462, 1720, 2791, 2924, 3655, 5582, 5848, 7310, 11164, 13955, 14620, 22328, 27910, 29240, 47447, 55820, 94894, 111640, 120013, 189788, 237235, 240026, 379576, 474470, 480052, 600065, 948940, 960104, 1200130, 1897880, 2040221, 2400260, 4080442, 4800520, 8160884, 10201105, 16321768, 20402210, 40804420, 81608840]

約数ペア:

[(1, 81608840), (2, 40804420), (4, 20402210), (5, 16321768), (8, 10201105), (10, 8160884), (17, 4800520), (20, 4080442), (34, 2400260), (40, 2040221), (43, 1897880), (68, 1200130), (85, 960104), (86, 948940), (136, 600065), (170, 480052), (172, 474470), (215, 379576), (340, 240026), (344, 237235), (430, 189788), (680, 120013), (731, 111640), (860, 94894), (1462, 55820), (1720, 47447), (2791, 29240), (2924, 27910), (3655, 22328), (5582, 14620), (5848, 13955), (7310, 11164)]