21646480

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:224

約数の個数: 80

約数和(自身を含む): 52925184

約数和(自身を除く): 31278704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 71, 74, 80, 103, 142, 148, 185, 206, 284, 296, 355, 370, 412, 515, 568, 592, 710, 740, 824, 1030, 1136, 1420, 1480, 1648, 2060, 2627, 2840, 2960, 3811, 4120, 5254, 5680, 7313, 7622, 8240, 10508, 13135, 14626, 15244, 19055, 21016, 26270, 29252, 30488, 36565, 38110, 42032, 52540, 58504, 60976, 73130, 76220, 105080, 117008, 146260, 152440, 210160, 270581, 292520, 304880, 541162, 585040, 1082324, 1352905, 2164648, 2705810, 4329296, 5411620, 10823240, 21646480]

約数ペア:

[(1, 21646480), (2, 10823240), (4, 5411620), (5, 4329296), (8, 2705810), (10, 2164648), (16, 1352905), (20, 1082324), (37, 585040), (40, 541162), (71, 304880), (74, 292520), (80, 270581), (103, 210160), (142, 152440), (148, 146260), (185, 117008), (206, 105080), (284, 76220), (296, 73130), (355, 60976), (370, 58504), (412, 52540), (515, 42032), (568, 38110), (592, 36565), (710, 30488), (740, 29252), (824, 26270), (1030, 21016), (1136, 19055), (1420, 15244), (1480, 14626), (1648, 13135), (2060, 10508), (2627, 8240), (2840, 7622), (2960, 7313), (3811, 5680), (4120, 5254)]