81538720

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{17573}}^1$

素因数の和:17617

約数の個数: 48

約数和(自身を含む): 199289160

約数和(自身を除く): 117750440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4640, 17573, 35146, 70292, 87865, 140584, 175730, 281168, 351460, 509617, 562336, 702920, 1019234, 1405840, 2038468, 2548085, 2811680, 4076936, 5096170, 8153872, 10192340, 16307744, 20384680, 40769360, 81538720]

約数ペア:

[(1, 81538720), (2, 40769360), (4, 20384680), (5, 16307744), (8, 10192340), (10, 8153872), (16, 5096170), (20, 4076936), (29, 2811680), (32, 2548085), (40, 2038468), (58, 1405840), (80, 1019234), (116, 702920), (145, 562336), (160, 509617), (232, 351460), (290, 281168), (464, 175730), (580, 140584), (928, 87865), (1160, 70292), (2320, 35146), (4640, 17573)]