19999800

素因数分解:

$2^3\times 3^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{271}}^1$

素因数の和:334

約数の個数: 144

約数和(自身を含む): 69058080

約数和(自身を除く): 49058280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 25, 30, 36, 40, 41, 45, 50, 60, 72, 75, 82, 90, 100, 120, 123, 150, 164, 180, 200, 205, 225, 246, 271, 300, 328, 360, 369, 410, 450, 492, 542, 600, 615, 738, 813, 820, 900, 984, 1025, 1084, 1230, 1355, 1476, 1626, 1640, 1800, 1845, 2050, 2168, 2439, 2460, 2710, 2952, 3075, 3252, 3690, 4065, 4100, 4878, 4920, 5420, 6150, 6504, 6775, 7380, 8130, 8200, 9225, 9756, 10840, 11111, 12195, 12300, 13550, 14760, 16260, 18450, 19512, 20325, 22222, 24390, 24600, 27100, 32520, 33333, 36900, 40650, 44444, 48780, 54200, 55555, 60975, 66666, 73800, 81300, 88888, 97560, 99999, 111110, 121950, 133332, 162600, 166665, 199998, 222220, 243900, 266664, 277775, 333330, 399996, 444440, 487800, 499995, 555550, 666660, 799992, 833325, 999990, 1111100, 1333320, 1666650, 1999980, 2222200, 2499975, 3333300, 3999960, 4999950, 6666600, 9999900, 19999800]

約数ペア:

[(1, 19999800), (2, 9999900), (3, 6666600), (4, 4999950), (5, 3999960), (6, 3333300), (8, 2499975), (9, 2222200), (10, 1999980), (12, 1666650), (15, 1333320), (18, 1111100), (20, 999990), (24, 833325), (25, 799992), (30, 666660), (36, 555550), (40, 499995), (41, 487800), (45, 444440), (50, 399996), (60, 333330), (72, 277775), (75, 266664), (82, 243900), (90, 222220), (100, 199998), (120, 166665), (123, 162600), (150, 133332), (164, 121950), (180, 111110), (200, 99999), (205, 97560), (225, 88888), (246, 81300), (271, 73800), (300, 66666), (328, 60975), (360, 55555), (369, 54200), (410, 48780), (450, 44444), (492, 40650), (542, 36900), (600, 33333), (615, 32520), (738, 27100), (813, 24600), (820, 24390), (900, 22222), (984, 20325), (1025, 19512), (1084, 18450), (1230, 16260), (1355, 14760), (1476, 13550), (1626, 12300), (1640, 12195), (1800, 11111), (1845, 10840), (2050, 9756), (2168, 9225), (2439, 8200), (2460, 8130), (2710, 7380), (2952, 6775), (3075, 6504), (3252, 6150), (3690, 5420), (4065, 4920), (4100, 4878)]