19902918

素因数分解:

$2^1\times 3^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{509}}^1$

素因数の和:554

約数の個数: 64

約数和(自身を含む): 48960000

約数和(自身を除く): 29057082

約数列:

[1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 49, 57, 98, 114, 133, 147, 266, 294, 343, 399, 509, 686, 798, 931, 1018, 1029, 1527, 1862, 2058, 2793, 3054, 3563, 5586, 6517, 7126, 9671, 10689, 13034, 19342, 19551, 21378, 24941, 29013, 39102, 49882, 58026, 67697, 74823, 135394, 149646, 174587, 203091, 349174, 406182, 473879, 523761, 947758, 1047522, 1421637, 2843274, 3317153, 6634306, 9951459, 19902918]

約数ペア:

[(1, 19902918), (2, 9951459), (3, 6634306), (6, 3317153), (7, 2843274), (14, 1421637), (19, 1047522), (21, 947758), (38, 523761), (42, 473879), (49, 406182), (57, 349174), (98, 203091), (114, 174587), (133, 149646), (147, 135394), (266, 74823), (294, 67697), (343, 58026), (399, 49882), (509, 39102), (686, 29013), (798, 24941), (931, 21378), (1018, 19551), (1029, 19342), (1527, 13034), (1862, 10689), (2058, 9671), (2793, 7126), (3054, 6517), (3563, 5586)]