21480316

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^2$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 47776176

約数和(自身を除く): 26295860

約数列:

[1, 2, 4, 11, 13, 17, 22, 26, 34, 44, 47, 52, 68, 94, 143, 187, 188, 221, 286, 374, 442, 517, 572, 611, 748, 799, 884, 1034, 1222, 1598, 2068, 2209, 2431, 2444, 3196, 4418, 4862, 6721, 8789, 8836, 9724, 10387, 13442, 17578, 20774, 24299, 26884, 28717, 35156, 37553, 41548, 48598, 57434, 75106, 97196, 114257, 114868, 150212, 228514, 315887, 413083, 457028, 488189, 631774, 826166, 976378, 1263548, 1652332, 1952756, 5370079, 10740158, 21480316]

約数ペア:

[(1, 21480316), (2, 10740158), (4, 5370079), (11, 1952756), (13, 1652332), (17, 1263548), (22, 976378), (26, 826166), (34, 631774), (44, 488189), (47, 457028), (52, 413083), (68, 315887), (94, 228514), (143, 150212), (187, 114868), (188, 114257), (221, 97196), (286, 75106), (374, 57434), (442, 48598), (517, 41548), (572, 37553), (611, 35156), (748, 28717), (799, 26884), (884, 24299), (1034, 20774), (1222, 17578), (1598, 13442), (2068, 10387), (2209, 9724), (2431, 8836), (2444, 8789), (3196, 6721), (4418, 4862)]