18921378

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{181}}^1$

素因数の和:343

約数の個数: 64

約数和(自身を含む): 46126080

約数和(自身を除く): 27204702

約数列:

[1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 131, 133, 181, 262, 266, 362, 393, 399, 543, 786, 798, 917, 1086, 1267, 1834, 2489, 2534, 2751, 3439, 3801, 4978, 5502, 6878, 7467, 7602, 10317, 14934, 17423, 20634, 23711, 24073, 34846, 47422, 48146, 52269, 71133, 72219, 104538, 142266, 144438, 165977, 331954, 450509, 497931, 901018, 995862, 1351527, 2703054, 3153563, 6307126, 9460689, 18921378]

約数ペア:

[(1, 18921378), (2, 9460689), (3, 6307126), (6, 3153563), (7, 2703054), (14, 1351527), (19, 995862), (21, 901018), (38, 497931), (42, 450509), (57, 331954), (114, 165977), (131, 144438), (133, 142266), (181, 104538), (262, 72219), (266, 71133), (362, 52269), (393, 48146), (399, 47422), (543, 34846), (786, 24073), (798, 23711), (917, 20634), (1086, 17423), (1267, 14934), (1834, 10317), (2489, 7602), (2534, 7467), (2751, 6878), (3439, 5502), (3801, 4978)]