19999560

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{821}}^1$

素因数の和:871

約数の個数: 128

約数和(自身を含む): 71020800

約数和(自身を除く): 51021240

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 29, 30, 35, 40, 42, 56, 58, 60, 70, 84, 87, 105, 116, 120, 140, 145, 168, 174, 203, 210, 232, 280, 290, 348, 406, 420, 435, 580, 609, 696, 812, 821, 840, 870, 1015, 1160, 1218, 1624, 1642, 1740, 2030, 2436, 2463, 3045, 3284, 3480, 4060, 4105, 4872, 4926, 5747, 6090, 6568, 8120, 8210, 9852, 11494, 12180, 12315, 16420, 17241, 19704, 22988, 23809, 24360, 24630, 28735, 32840, 34482, 45976, 47618, 49260, 57470, 68964, 71427, 86205, 95236, 98520, 114940, 119045, 137928, 142854, 166663, 172410, 190472, 229880, 238090, 285708, 333326, 344820, 357135, 476180, 499989, 571416, 666652, 689640, 714270, 833315, 952360, 999978, 1333304, 1428540, 1666630, 1999956, 2499945, 2857080, 3333260, 3999912, 4999890, 6666520, 9999780, 19999560]

約数ペア:

[(1, 19999560), (2, 9999780), (3, 6666520), (4, 4999890), (5, 3999912), (6, 3333260), (7, 2857080), (8, 2499945), (10, 1999956), (12, 1666630), (14, 1428540), (15, 1333304), (20, 999978), (21, 952360), (24, 833315), (28, 714270), (29, 689640), (30, 666652), (35, 571416), (40, 499989), (42, 476180), (56, 357135), (58, 344820), (60, 333326), (70, 285708), (84, 238090), (87, 229880), (105, 190472), (116, 172410), (120, 166663), (140, 142854), (145, 137928), (168, 119045), (174, 114940), (203, 98520), (210, 95236), (232, 86205), (280, 71427), (290, 68964), (348, 57470), (406, 49260), (420, 47618), (435, 45976), (580, 34482), (609, 32840), (696, 28735), (812, 24630), (821, 24360), (840, 23809), (870, 22988), (1015, 19704), (1160, 17241), (1218, 16420), (1624, 12315), (1642, 12180), (1740, 11494), (2030, 9852), (2436, 8210), (2463, 8120), (3045, 6568), (3284, 6090), (3480, 5747), (4060, 4926), (4105, 4872)]