640405108

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{383}}^1\times {\mathrm{449}}^1$

素因数の和:869

約数の個数: 72

約数和(自身を含む): 1378944000

約数和(自身を除く): 738538892

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 76, 98, 133, 196, 266, 383, 449, 532, 766, 898, 931, 1532, 1796, 1862, 2681, 3143, 3724, 5362, 6286, 7277, 8531, 10724, 12572, 14554, 17062, 18767, 22001, 29108, 34124, 37534, 44002, 50939, 59717, 75068, 88004, 101878, 119434, 171967, 203756, 238868, 343934, 356573, 418019, 687868, 713146, 836038, 1203769, 1426292, 1672076, 2407538, 3267373, 4815076, 6534746, 8426383, 13069492, 16852766, 22871611, 33705532, 45743222, 91486444, 160101277, 320202554, 640405108]

約数ペア:

[(1, 640405108), (2, 320202554), (4, 160101277), (7, 91486444), (14, 45743222), (19, 33705532), (28, 22871611), (38, 16852766), (49, 13069492), (76, 8426383), (98, 6534746), (133, 4815076), (196, 3267373), (266, 2407538), (383, 1672076), (449, 1426292), (532, 1203769), (766, 836038), (898, 713146), (931, 687868), (1532, 418019), (1796, 356573), (1862, 343934), (2681, 238868), (3143, 203756), (3724, 171967), (5362, 119434), (6286, 101878), (7277, 88004), (8531, 75068), (10724, 59717), (12572, 50939), (14554, 44002), (17062, 37534), (18767, 34124), (22001, 29108)]