217521798

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1\times {\mathrm{389}}^1$

素因数の和:581

約数の個数: 64

約数和(自身を含む): 481178880

約数和(自身を除く): 263657082

約数列:

[1, 2, 3, 6, 13, 26, 39, 67, 78, 107, 134, 201, 214, 321, 389, 402, 642, 778, 871, 1167, 1391, 1742, 2334, 2613, 2782, 4173, 5057, 5226, 7169, 8346, 10114, 14338, 15171, 21507, 26063, 30342, 41623, 43014, 52126, 78189, 83246, 93197, 124869, 156378, 186394, 249738, 279591, 338819, 541099, 559182, 677638, 1016457, 1082198, 1623297, 2032914, 2788741, 3246594, 5577482, 8366223, 16732446, 36253633, 72507266, 108760899, 217521798]

約数ペア:

[(1, 217521798), (2, 108760899), (3, 72507266), (6, 36253633), (13, 16732446), (26, 8366223), (39, 5577482), (67, 3246594), (78, 2788741), (107, 2032914), (134, 1623297), (201, 1082198), (214, 1016457), (321, 677638), (389, 559182), (402, 541099), (642, 338819), (778, 279591), (871, 249738), (1167, 186394), (1391, 156378), (1742, 124869), (2334, 93197), (2613, 83246), (2782, 78189), (4173, 52126), (5057, 43014), (5226, 41623), (7169, 30342), (8346, 26063), (10114, 21507), (14338, 15171)]