81991320

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{487}}^1$

素因数の和:585

約数の個数: 128

約数和(自身を含む): 261411840

約数和(自身を除く): 179420520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 40, 46, 60, 61, 69, 92, 115, 120, 122, 138, 183, 184, 230, 244, 276, 305, 345, 366, 460, 487, 488, 552, 610, 690, 732, 915, 920, 974, 1220, 1380, 1403, 1461, 1464, 1830, 1948, 2435, 2440, 2760, 2806, 2922, 3660, 3896, 4209, 4870, 5612, 5844, 7015, 7305, 7320, 8418, 9740, 11201, 11224, 11688, 14030, 14610, 16836, 19480, 21045, 22402, 28060, 29220, 29707, 33603, 33672, 42090, 44804, 56005, 56120, 58440, 59414, 67206, 84180, 89121, 89608, 112010, 118828, 134412, 148535, 168015, 168360, 178242, 224020, 237656, 268824, 297070, 336030, 356484, 445605, 448040, 594140, 672060, 683261, 712968, 891210, 1188280, 1344120, 1366522, 1782420, 2049783, 2733044, 3416305, 3564840, 4099566, 5466088, 6832610, 8199132, 10248915, 13665220, 16398264, 20497830, 27330440, 40995660, 81991320]

約数ペア:

[(1, 81991320), (2, 40995660), (3, 27330440), (4, 20497830), (5, 16398264), (6, 13665220), (8, 10248915), (10, 8199132), (12, 6832610), (15, 5466088), (20, 4099566), (23, 3564840), (24, 3416305), (30, 2733044), (40, 2049783), (46, 1782420), (60, 1366522), (61, 1344120), (69, 1188280), (92, 891210), (115, 712968), (120, 683261), (122, 672060), (138, 594140), (183, 448040), (184, 445605), (230, 356484), (244, 336030), (276, 297070), (305, 268824), (345, 237656), (366, 224020), (460, 178242), (487, 168360), (488, 168015), (552, 148535), (610, 134412), (690, 118828), (732, 112010), (915, 89608), (920, 89121), (974, 84180), (1220, 67206), (1380, 59414), (1403, 58440), (1461, 56120), (1464, 56005), (1830, 44804), (1948, 42090), (2435, 33672), (2440, 33603), (2760, 29707), (2806, 29220), (2922, 28060), (3660, 22402), (3896, 21045), (4209, 19480), (4870, 16836), (5612, 14610), (5844, 14030), (7015, 11688), (7305, 11224), (7320, 11201), (8418, 9740)]