18950206720

素因数分解:

$2^8\times 5^1\times {\mathrm{71}}^1\times {\mathrm{208519}}^1$

素因数の和:208611

約数の個数: 72

約数和(自身を含む): 46031207040

約数和(自身を除く): 27081000320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 256, 284, 320, 355, 568, 640, 710, 1136, 1280, 1420, 2272, 2840, 4544, 5680, 9088, 11360, 18176, 22720, 45440, 90880, 208519, 417038, 834076, 1042595, 1668152, 2085190, 3336304, 4170380, 6672608, 8340760, 13345216, 14804849, 16681520, 26690432, 29609698, 33363040, 53380864, 59219396, 66726080, 74024245, 118438792, 133452160, 148048490, 236877584, 266904320, 296096980, 473755168, 592193960, 947510336, 1184387920, 1895020672, 2368775840, 3790041344, 4737551680, 9475103360, 18950206720]

約数ペア:

[(1, 18950206720), (2, 9475103360), (4, 4737551680), (5, 3790041344), (8, 2368775840), (10, 1895020672), (16, 1184387920), (20, 947510336), (32, 592193960), (40, 473755168), (64, 296096980), (71, 266904320), (80, 236877584), (128, 148048490), (142, 133452160), (160, 118438792), (256, 74024245), (284, 66726080), (320, 59219396), (355, 53380864), (568, 33363040), (640, 29609698), (710, 26690432), (1136, 16681520), (1280, 14804849), (1420, 13345216), (2272, 8340760), (2840, 6672608), (4544, 4170380), (5680, 3336304), (9088, 2085190), (11360, 1668152), (18176, 1042595), (22720, 834076), (45440, 417038), (90880, 208519)]