19728800

素因数分解:

$2^5\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{271}}^1$

素因数の和:311

約数の個数: 144

約数和(自身を含む): 59496192

約数和(自身を除く): 39767392

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 25, 26, 28, 32, 35, 40, 50, 52, 56, 65, 70, 80, 91, 100, 104, 112, 130, 140, 160, 175, 182, 200, 208, 224, 260, 271, 280, 325, 350, 364, 400, 416, 455, 520, 542, 560, 650, 700, 728, 800, 910, 1040, 1084, 1120, 1300, 1355, 1400, 1456, 1820, 1897, 2080, 2168, 2275, 2600, 2710, 2800, 2912, 3523, 3640, 3794, 4336, 4550, 5200, 5420, 5600, 6775, 7046, 7280, 7588, 8672, 9100, 9485, 10400, 10840, 13550, 14092, 14560, 15176, 17615, 18200, 18970, 21680, 24661, 27100, 28184, 30352, 35230, 36400, 37940, 43360, 47425, 49322, 54200, 56368, 60704, 70460, 72800, 75880, 88075, 94850, 98644, 108400, 112736, 123305, 140920, 151760, 176150, 189700, 197288, 216800, 246610, 281840, 303520, 352300, 379400, 394576, 493220, 563680, 616525, 704600, 758800, 789152, 986440, 1233050, 1409200, 1517600, 1972880, 2466100, 2818400, 3945760, 4932200, 9864400, 19728800]

約数ペア:

[(1, 19728800), (2, 9864400), (4, 4932200), (5, 3945760), (7, 2818400), (8, 2466100), (10, 1972880), (13, 1517600), (14, 1409200), (16, 1233050), (20, 986440), (25, 789152), (26, 758800), (28, 704600), (32, 616525), (35, 563680), (40, 493220), (50, 394576), (52, 379400), (56, 352300), (65, 303520), (70, 281840), (80, 246610), (91, 216800), (100, 197288), (104, 189700), (112, 176150), (130, 151760), (140, 140920), (160, 123305), (175, 112736), (182, 108400), (200, 98644), (208, 94850), (224, 88075), (260, 75880), (271, 72800), (280, 70460), (325, 60704), (350, 56368), (364, 54200), (400, 49322), (416, 47425), (455, 43360), (520, 37940), (542, 36400), (560, 35230), (650, 30352), (700, 28184), (728, 27100), (800, 24661), (910, 21680), (1040, 18970), (1084, 18200), (1120, 17615), (1300, 15176), (1355, 14560), (1400, 14092), (1456, 13550), (1820, 10840), (1897, 10400), (2080, 9485), (2168, 9100), (2275, 8672), (2600, 7588), (2710, 7280), (2800, 7046), (2912, 6775), (3523, 5600), (3640, 5420), (3794, 5200), (4336, 4550)]