21120606

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:218

約数の個数: 72

約数和(自身を含む): 50872536

約数和(自身を除く): 29751930

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 53, 78, 106, 117, 131, 159, 169, 234, 262, 318, 338, 393, 477, 507, 689, 786, 954, 1014, 1179, 1378, 1521, 1703, 2067, 2358, 3042, 3406, 4134, 5109, 6201, 6943, 8957, 10218, 12402, 13886, 15327, 17914, 20829, 22139, 26871, 30654, 41658, 44278, 53742, 62487, 66417, 80613, 90259, 124974, 132834, 161226, 180518, 199251, 270777, 398502, 541554, 812331, 1173367, 1624662, 2346734, 3520101, 7040202, 10560303, 21120606]

約数ペア:

[(1, 21120606), (2, 10560303), (3, 7040202), (6, 3520101), (9, 2346734), (13, 1624662), (18, 1173367), (26, 812331), (39, 541554), (53, 398502), (78, 270777), (106, 199251), (117, 180518), (131, 161226), (159, 132834), (169, 124974), (234, 90259), (262, 80613), (318, 66417), (338, 62487), (393, 53742), (477, 44278), (507, 41658), (689, 30654), (786, 26871), (954, 22139), (1014, 20829), (1179, 17914), (1378, 15327), (1521, 13886), (1703, 12402), (2067, 10218), (2358, 8957), (3042, 6943), (3406, 6201), (4134, 5109)]