20725484

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 43287552

約数和(自身を除く): 22562068

約数列:

[1, 2, 4, 13, 23, 26, 31, 43, 46, 52, 62, 86, 92, 124, 169, 172, 299, 338, 403, 559, 598, 676, 713, 806, 989, 1118, 1196, 1333, 1426, 1612, 1978, 2236, 2666, 2852, 3887, 3956, 5239, 5332, 7267, 7774, 9269, 10478, 12857, 14534, 15548, 17329, 18538, 20956, 25714, 29068, 30659, 34658, 37076, 51428, 61318, 69316, 120497, 122636, 167141, 225277, 240994, 334282, 398567, 450554, 481988, 668564, 797134, 901108, 1594268, 5181371, 10362742, 20725484]

約数ペア:

[(1, 20725484), (2, 10362742), (4, 5181371), (13, 1594268), (23, 901108), (26, 797134), (31, 668564), (43, 481988), (46, 450554), (52, 398567), (62, 334282), (86, 240994), (92, 225277), (124, 167141), (169, 122636), (172, 120497), (299, 69316), (338, 61318), (403, 51428), (559, 37076), (598, 34658), (676, 30659), (713, 29068), (806, 25714), (989, 20956), (1118, 18538), (1196, 17329), (1333, 15548), (1426, 14534), (1612, 12857), (1978, 10478), (2236, 9269), (2666, 7774), (2852, 7267), (3887, 5332), (3956, 5239)]