21058480

素因数分解:

$2^4\times 5^1\times {\mathrm{461}}^1\times {\mathrm{571}}^1$

素因数の和:1045

約数の個数: 40

約数和(自身を含む): 49153104

約数和(自身を除く): 28094624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 461, 571, 922, 1142, 1844, 2284, 2305, 2855, 3688, 4568, 4610, 5710, 7376, 9136, 9220, 11420, 18440, 22840, 36880, 45680, 263231, 526462, 1052924, 1316155, 2105848, 2632310, 4211696, 5264620, 10529240, 21058480]

約数ペア:

[(1, 21058480), (2, 10529240), (4, 5264620), (5, 4211696), (8, 2632310), (10, 2105848), (16, 1316155), (20, 1052924), (40, 526462), (80, 263231), (461, 45680), (571, 36880), (922, 22840), (1142, 18440), (1844, 11420), (2284, 9220), (2305, 9136), (2855, 7376), (3688, 5710), (4568, 4610)]