21456484

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 44706816

約数和(自身を除く): 23250332

約数列:

[1, 2, 4, 7, 14, 28, 43, 71, 86, 142, 172, 251, 284, 301, 497, 502, 602, 994, 1004, 1204, 1757, 1988, 3053, 3514, 6106, 7028, 10793, 12212, 17821, 21371, 21586, 35642, 42742, 43172, 71284, 75551, 85484, 124747, 151102, 249494, 302204, 498988, 766303, 1532606, 3065212, 5364121, 10728242, 21456484]

約数ペア:

[(1, 21456484), (2, 10728242), (4, 5364121), (7, 3065212), (14, 1532606), (28, 766303), (43, 498988), (71, 302204), (86, 249494), (142, 151102), (172, 124747), (251, 85484), (284, 75551), (301, 71284), (497, 43172), (502, 42742), (602, 35642), (994, 21586), (1004, 21371), (1204, 17821), (1757, 12212), (1988, 10793), (3053, 7028), (3514, 6106)]