7801480

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:190

約数の個数: 64

約数和(自身を含む): 18506880

約数和(自身を除く): 10705400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 67, 71, 82, 134, 142, 164, 205, 268, 284, 328, 335, 355, 410, 536, 568, 670, 710, 820, 1340, 1420, 1640, 2680, 2747, 2840, 2911, 4757, 5494, 5822, 9514, 10988, 11644, 13735, 14555, 19028, 21976, 23288, 23785, 27470, 29110, 38056, 47570, 54940, 58220, 95140, 109880, 116440, 190280, 195037, 390074, 780148, 975185, 1560296, 1950370, 3900740, 7801480]

約数ペア:

[(1, 7801480), (2, 3900740), (4, 1950370), (5, 1560296), (8, 975185), (10, 780148), (20, 390074), (40, 195037), (41, 190280), (67, 116440), (71, 109880), (82, 95140), (134, 58220), (142, 54940), (164, 47570), (205, 38056), (268, 29110), (284, 27470), (328, 23785), (335, 23288), (355, 21976), (410, 19028), (536, 14555), (568, 13735), (670, 11644), (710, 10988), (820, 9514), (1340, 5822), (1420, 5494), (1640, 4757), (2680, 2911), (2747, 2840)]