81019520

素因数分解:

$2^7\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1783}}^1$

素因数の和:1873

約数の個数: 64

約数和(自身を含む): 196525440

約数和(自身を除く): 115505920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 284, 320, 355, 568, 640, 710, 1136, 1420, 1783, 2272, 2840, 3566, 4544, 5680, 7132, 8915, 9088, 11360, 14264, 17830, 22720, 28528, 35660, 45440, 57056, 71320, 114112, 126593, 142640, 228224, 253186, 285280, 506372, 570560, 632965, 1012744, 1141120, 1265930, 2025488, 2531860, 4050976, 5063720, 8101952, 10127440, 16203904, 20254880, 40509760, 81019520]

約数ペア:

[(1, 81019520), (2, 40509760), (4, 20254880), (5, 16203904), (8, 10127440), (10, 8101952), (16, 5063720), (20, 4050976), (32, 2531860), (40, 2025488), (64, 1265930), (71, 1141120), (80, 1012744), (128, 632965), (142, 570560), (160, 506372), (284, 285280), (320, 253186), (355, 228224), (568, 142640), (640, 126593), (710, 114112), (1136, 71320), (1420, 57056), (1783, 45440), (2272, 35660), (2840, 28528), (3566, 22720), (4544, 17830), (5680, 14264), (7132, 11360), (8915, 9088)]