21091928

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1$

素因数の和:312

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 26082472

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 88, 103, 104, 143, 179, 206, 286, 358, 412, 572, 716, 824, 1133, 1144, 1339, 1432, 1969, 2266, 2327, 2678, 3938, 4532, 4654, 5356, 7876, 9064, 9308, 10712, 14729, 15752, 18437, 18616, 25597, 29458, 36874, 51194, 58916, 73748, 102388, 117832, 147496, 202807, 204776, 239681, 405614, 479362, 811228, 958724, 1622456, 1917448, 2636491, 5272982, 10545964, 21091928]

約数ペア:

[(1, 21091928), (2, 10545964), (4, 5272982), (8, 2636491), (11, 1917448), (13, 1622456), (22, 958724), (26, 811228), (44, 479362), (52, 405614), (88, 239681), (103, 204776), (104, 202807), (143, 147496), (179, 117832), (206, 102388), (286, 73748), (358, 58916), (412, 51194), (572, 36874), (716, 29458), (824, 25597), (1133, 18616), (1144, 18437), (1339, 15752), (1432, 14729), (1969, 10712), (2266, 9308), (2327, 9064), (2678, 7876), (3938, 5356), (4532, 4654)]