20725360

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:242

約数の個数: 80

約数和(自身を含む): 50925312

約数和(自身を除く): 30199952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 61, 62, 80, 122, 124, 137, 155, 244, 248, 274, 305, 310, 488, 496, 548, 610, 620, 685, 976, 1096, 1220, 1240, 1370, 1891, 2192, 2440, 2480, 2740, 3782, 4247, 4880, 5480, 7564, 8357, 8494, 9455, 10960, 15128, 16714, 16988, 18910, 21235, 30256, 33428, 33976, 37820, 41785, 42470, 66856, 67952, 75640, 83570, 84940, 133712, 151280, 167140, 169880, 259067, 334280, 339760, 518134, 668560, 1036268, 1295335, 2072536, 2590670, 4145072, 5181340, 10362680, 20725360]

約数ペア:

[(1, 20725360), (2, 10362680), (4, 5181340), (5, 4145072), (8, 2590670), (10, 2072536), (16, 1295335), (20, 1036268), (31, 668560), (40, 518134), (61, 339760), (62, 334280), (80, 259067), (122, 169880), (124, 167140), (137, 151280), (155, 133712), (244, 84940), (248, 83570), (274, 75640), (305, 67952), (310, 66856), (488, 42470), (496, 41785), (548, 37820), (610, 33976), (620, 33428), (685, 30256), (976, 21235), (1096, 18910), (1220, 16988), (1240, 16714), (1370, 15128), (1891, 10960), (2192, 9455), (2440, 8494), (2480, 8357), (2740, 7564), (3782, 5480), (4247, 4880)]