257285120

素因数分解:

$2^{10}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1621}}^1$

素因数の和:1677

約数の個数: 88

約数和(自身を含む): 637484928

約数和(自身を除く): 380199808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 992, 1024, 1240, 1280, 1621, 1984, 2480, 2560, 3242, 3968, 4960, 5120, 6484, 7936, 8105, 9920, 12968, 15872, 16210, 19840, 25936, 31744, 32420, 39680, 50251, 51872, 64840, 79360, 100502, 103744, 129680, 158720, 201004, 207488, 251255, 259360, 402008, 414976, 502510, 518720, 804016, 829952, 1005020, 1037440, 1608032, 1659904, 2010040, 2074880, 3216064, 4020080, 4149760, 6432128, 8040160, 8299520, 12864256, 16080320, 25728512, 32160640, 51457024, 64321280, 128642560, 257285120]

約数ペア:

[(1, 257285120), (2, 128642560), (4, 64321280), (5, 51457024), (8, 32160640), (10, 25728512), (16, 16080320), (20, 12864256), (31, 8299520), (32, 8040160), (40, 6432128), (62, 4149760), (64, 4020080), (80, 3216064), (124, 2074880), (128, 2010040), (155, 1659904), (160, 1608032), (248, 1037440), (256, 1005020), (310, 829952), (320, 804016), (496, 518720), (512, 502510), (620, 414976), (640, 402008), (992, 259360), (1024, 251255), (1240, 207488), (1280, 201004), (1621, 158720), (1984, 129680), (2480, 103744), (2560, 100502), (3242, 79360), (3968, 64840), (4960, 51872), (5120, 50251), (6484, 39680), (7936, 32420), (8105, 31744), (9920, 25936), (12968, 19840), (15872, 16210)]