21387392

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{12853}}^1$

素因数の和:12880

約数の個数: 32

約数和(自身を含む): 45888780

約数和(自身を除く): 24501388

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 208, 416, 832, 1664, 12853, 25706, 51412, 102824, 167089, 205648, 334178, 411296, 668356, 822592, 1336712, 1645184, 2673424, 5346848, 10693696, 21387392]

約数ペア:

[(1, 21387392), (2, 10693696), (4, 5346848), (8, 2673424), (13, 1645184), (16, 1336712), (26, 822592), (32, 668356), (52, 411296), (64, 334178), (104, 205648), (128, 167089), (208, 102824), (416, 51412), (832, 25706), (1664, 12853)]