19854280

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:254

約数の個数: 64

約数和(自身を含む): 46425600

約数和(自身を除く): 26571320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 79, 103, 122, 158, 206, 244, 305, 316, 395, 412, 488, 515, 610, 632, 790, 824, 1030, 1220, 1580, 2060, 2440, 3160, 4120, 4819, 6283, 8137, 9638, 12566, 16274, 19276, 24095, 25132, 31415, 32548, 38552, 40685, 48190, 50264, 62830, 65096, 81370, 96380, 125660, 162740, 192760, 251320, 325480, 496357, 992714, 1985428, 2481785, 3970856, 4963570, 9927140, 19854280]

約数ペア:

[(1, 19854280), (2, 9927140), (4, 4963570), (5, 3970856), (8, 2481785), (10, 1985428), (20, 992714), (40, 496357), (61, 325480), (79, 251320), (103, 192760), (122, 162740), (158, 125660), (206, 96380), (244, 81370), (305, 65096), (316, 62830), (395, 50264), (412, 48190), (488, 40685), (515, 38552), (610, 32548), (632, 31415), (790, 25132), (824, 24095), (1030, 19276), (1220, 16274), (1580, 12566), (2060, 9638), (2440, 8137), (3160, 6283), (4120, 4819)]