400000008

素因数分解:

$2^3\times 3^1\times {\mathrm{19}}^1\times {\mathrm{739}}^1\times {\mathrm{1187}}^1$

素因数の和:1954

約数の個数: 64

約数和(自身を含む): 1054944000

約数和(自身を除く): 654943992

約数列:

[1, 2, 3, 4, 6, 8, 12, 19, 24, 38, 57, 76, 114, 152, 228, 456, 739, 1187, 1478, 2217, 2374, 2956, 3561, 4434, 4748, 5912, 7122, 8868, 9496, 14041, 14244, 17736, 22553, 28082, 28488, 42123, 45106, 56164, 67659, 84246, 90212, 112328, 135318, 168492, 180424, 270636, 336984, 541272, 877193, 1754386, 2631579, 3508772, 5263158, 7017544, 10526316, 16666667, 21052632, 33333334, 50000001, 66666668, 100000002, 133333336, 200000004, 400000008]

約数ペア:

[(1, 400000008), (2, 200000004), (3, 133333336), (4, 100000002), (6, 66666668), (8, 50000001), (12, 33333334), (19, 21052632), (24, 16666667), (38, 10526316), (57, 7017544), (76, 5263158), (114, 3508772), (152, 2631579), (228, 1754386), (456, 877193), (739, 541272), (1187, 336984), (1478, 270636), (2217, 180424), (2374, 168492), (2956, 135318), (3561, 112328), (4434, 90212), (4748, 84246), (5912, 67659), (7122, 56164), (8868, 45106), (9496, 42123), (14041, 28488), (14244, 28082), (17736, 22553)]