81947680

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^2\times {\mathrm{277}}^1$

素因数の和:378

約数の個数: 72

約数和(自身を含む): 198924012

約数和(自身を除く): 116976332

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 277, 344, 430, 554, 688, 860, 1108, 1376, 1385, 1720, 1849, 2216, 2770, 3440, 3698, 4432, 5540, 6880, 7396, 8864, 9245, 11080, 11911, 14792, 18490, 22160, 23822, 29584, 36980, 44320, 47644, 59168, 59555, 73960, 95288, 119110, 147920, 190576, 238220, 295840, 381152, 476440, 512173, 952880, 1024346, 1905760, 2048692, 2560865, 4097384, 5121730, 8194768, 10243460, 16389536, 20486920, 40973840, 81947680]

約数ペア:

[(1, 81947680), (2, 40973840), (4, 20486920), (5, 16389536), (8, 10243460), (10, 8194768), (16, 5121730), (20, 4097384), (32, 2560865), (40, 2048692), (43, 1905760), (80, 1024346), (86, 952880), (160, 512173), (172, 476440), (215, 381152), (277, 295840), (344, 238220), (430, 190576), (554, 147920), (688, 119110), (860, 95288), (1108, 73960), (1376, 59555), (1385, 59168), (1720, 47644), (1849, 44320), (2216, 36980), (2770, 29584), (3440, 23822), (3698, 22160), (4432, 18490), (5540, 14792), (6880, 11911), (7396, 11080), (8864, 9245)]