21308768

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{283}}^1$

素因数の和:487

約数の個数: 48

約数和(自身を含む): 45588816

約数和(自身を除く): 24280048

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 181, 208, 283, 362, 416, 566, 724, 1132, 1448, 2264, 2353, 2896, 3679, 4528, 4706, 5792, 7358, 9056, 9412, 14716, 18824, 29432, 37648, 51223, 58864, 75296, 102446, 117728, 204892, 409784, 665899, 819568, 1331798, 1639136, 2663596, 5327192, 10654384, 21308768]

約数ペア:

[(1, 21308768), (2, 10654384), (4, 5327192), (8, 2663596), (13, 1639136), (16, 1331798), (26, 819568), (32, 665899), (52, 409784), (104, 204892), (181, 117728), (208, 102446), (283, 75296), (362, 58864), (416, 51223), (566, 37648), (724, 29432), (1132, 18824), (1448, 14716), (2264, 9412), (2353, 9056), (2896, 7358), (3679, 5792), (4528, 4706)]