21563048

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{389}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 44963100

約数和(自身を除く): 23400052

約数列:

[1, 2, 4, 8, 13, 26, 41, 52, 82, 104, 164, 169, 328, 338, 389, 533, 676, 778, 1066, 1352, 1556, 2132, 3112, 4264, 5057, 6929, 10114, 13858, 15949, 20228, 27716, 31898, 40456, 55432, 63796, 65741, 127592, 131482, 207337, 262964, 414674, 525928, 829348, 1658696, 2695381, 5390762, 10781524, 21563048]

約数ペア:

[(1, 21563048), (2, 10781524), (4, 5390762), (8, 2695381), (13, 1658696), (26, 829348), (41, 525928), (52, 414674), (82, 262964), (104, 207337), (164, 131482), (169, 127592), (328, 65741), (338, 63796), (389, 55432), (533, 40456), (676, 31898), (778, 27716), (1066, 20228), (1352, 15949), (1556, 13858), (2132, 10114), (3112, 6929), (4264, 5057)]