19990880

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1373}}^1$

素因数の和:1408

約数の個数: 96

約数和(自身を含む): 58169664

約数和(自身を除く): 38178784

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 160, 182, 208, 224, 260, 280, 364, 416, 455, 520, 560, 728, 910, 1040, 1120, 1373, 1456, 1820, 2080, 2746, 2912, 3640, 5492, 6865, 7280, 9611, 10984, 13730, 14560, 17849, 19222, 21968, 27460, 35698, 38444, 43936, 48055, 54920, 71396, 76888, 89245, 96110, 109840, 124943, 142792, 153776, 178490, 192220, 219680, 249886, 285584, 307552, 356980, 384440, 499772, 571168, 624715, 713960, 768880, 999544, 1249430, 1427920, 1537760, 1999088, 2498860, 2855840, 3998176, 4997720, 9995440, 19990880]

約数ペア:

[(1, 19990880), (2, 9995440), (4, 4997720), (5, 3998176), (7, 2855840), (8, 2498860), (10, 1999088), (13, 1537760), (14, 1427920), (16, 1249430), (20, 999544), (26, 768880), (28, 713960), (32, 624715), (35, 571168), (40, 499772), (52, 384440), (56, 356980), (65, 307552), (70, 285584), (80, 249886), (91, 219680), (104, 192220), (112, 178490), (130, 153776), (140, 142792), (160, 124943), (182, 109840), (208, 96110), (224, 89245), (260, 76888), (280, 71396), (364, 54920), (416, 48055), (455, 43936), (520, 38444), (560, 35698), (728, 27460), (910, 21968), (1040, 19222), (1120, 17849), (1373, 14560), (1456, 13730), (1820, 10984), (2080, 9611), (2746, 7280), (2912, 6865), (3640, 5492)]