640178688

素因数分解:

$2^9\times 3^1\times {\mathrm{23}}^1\times {\mathrm{18121}}^1$

素因数の和:18165

約数の個数: 80

約数和(自身を含む): 1779725376

約数和(自身を除く): 1139546688

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 23, 24, 32, 46, 48, 64, 69, 92, 96, 128, 138, 184, 192, 256, 276, 368, 384, 512, 552, 736, 768, 1104, 1472, 1536, 2208, 2944, 4416, 5888, 8832, 11776, 17664, 18121, 35328, 36242, 54363, 72484, 108726, 144968, 217452, 289936, 416783, 434904, 579872, 833566, 869808, 1159744, 1250349, 1667132, 1739616, 2319488, 2500698, 3334264, 3479232, 4638976, 5001396, 6668528, 6958464, 9277952, 10002792, 13337056, 13916928, 20005584, 26674112, 27833856, 40011168, 53348224, 80022336, 106696448, 160044672, 213392896, 320089344, 640178688]

約数ペア:

[(1, 640178688), (2, 320089344), (3, 213392896), (4, 160044672), (6, 106696448), (8, 80022336), (12, 53348224), (16, 40011168), (23, 27833856), (24, 26674112), (32, 20005584), (46, 13916928), (48, 13337056), (64, 10002792), (69, 9277952), (92, 6958464), (96, 6668528), (128, 5001396), (138, 4638976), (184, 3479232), (192, 3334264), (256, 2500698), (276, 2319488), (368, 1739616), (384, 1667132), (512, 1250349), (552, 1159744), (736, 869808), (768, 833566), (1104, 579872), (1472, 434904), (1536, 416783), (2208, 289936), (2944, 217452), (4416, 144968), (5888, 108726), (8832, 72484), (11776, 54363), (17664, 36242), (18121, 35328)]