1981720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1$

素因数の和:164

約数の個数: 64

約数和(自身を含む): 4979520

約数和(自身を除く): 2997800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 37, 40, 52, 65, 74, 103, 104, 130, 148, 185, 206, 260, 296, 370, 412, 481, 515, 520, 740, 824, 962, 1030, 1339, 1480, 1924, 2060, 2405, 2678, 3811, 3848, 4120, 4810, 5356, 6695, 7622, 9620, 10712, 13390, 15244, 19055, 19240, 26780, 30488, 38110, 49543, 53560, 76220, 99086, 152440, 198172, 247715, 396344, 495430, 990860, 1981720]

約数ペア:

[(1, 1981720), (2, 990860), (4, 495430), (5, 396344), (8, 247715), (10, 198172), (13, 152440), (20, 99086), (26, 76220), (37, 53560), (40, 49543), (52, 38110), (65, 30488), (74, 26780), (103, 19240), (104, 19055), (130, 15244), (148, 13390), (185, 10712), (206, 9620), (260, 7622), (296, 6695), (370, 5356), (412, 4810), (481, 4120), (515, 3848), (520, 3811), (740, 2678), (824, 2405), (962, 2060), (1030, 1924), (1339, 1480)]