21227409

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 36661248

約数和(自身を除く): 15433839

約数列:

[1, 3, 7, 9, 21, 47, 63, 67, 107, 141, 201, 321, 329, 423, 469, 603, 749, 963, 987, 1407, 2247, 2961, 3149, 4221, 5029, 6741, 7169, 9447, 15087, 21507, 22043, 28341, 35203, 45261, 50183, 64521, 66129, 105609, 150549, 198387, 316827, 336943, 451647, 1010829, 2358601, 3032487, 7075803, 21227409]

約数ペア:

[(1, 21227409), (3, 7075803), (7, 3032487), (9, 2358601), (21, 1010829), (47, 451647), (63, 336943), (67, 316827), (107, 198387), (141, 150549), (201, 105609), (321, 66129), (329, 64521), (423, 50183), (469, 45261), (603, 35203), (749, 28341), (963, 22043), (987, 21507), (1407, 15087), (2247, 9447), (2961, 7169), (3149, 6741), (4221, 5029)]