20897520

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{1777}}^1$

素因数の和:1807

約数の個数: 120

約数和(自身を含む): 75401424

約数和(自身を除く): 54503904

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 49, 56, 60, 70, 80, 84, 98, 105, 112, 120, 140, 147, 168, 196, 210, 240, 245, 280, 294, 336, 392, 420, 490, 560, 588, 735, 784, 840, 980, 1176, 1470, 1680, 1777, 1960, 2352, 2940, 3554, 3920, 5331, 5880, 7108, 8885, 10662, 11760, 12439, 14216, 17770, 21324, 24878, 26655, 28432, 35540, 37317, 42648, 49756, 53310, 62195, 71080, 74634, 85296, 87073, 99512, 106620, 124390, 142160, 149268, 174146, 186585, 199024, 213240, 248780, 261219, 298536, 348292, 373170, 426480, 435365, 497560, 522438, 597072, 696584, 746340, 870730, 995120, 1044876, 1306095, 1393168, 1492680, 1741460, 2089752, 2612190, 2985360, 3482920, 4179504, 5224380, 6965840, 10448760, 20897520]

約数ペア:

[(1, 20897520), (2, 10448760), (3, 6965840), (4, 5224380), (5, 4179504), (6, 3482920), (7, 2985360), (8, 2612190), (10, 2089752), (12, 1741460), (14, 1492680), (15, 1393168), (16, 1306095), (20, 1044876), (21, 995120), (24, 870730), (28, 746340), (30, 696584), (35, 597072), (40, 522438), (42, 497560), (48, 435365), (49, 426480), (56, 373170), (60, 348292), (70, 298536), (80, 261219), (84, 248780), (98, 213240), (105, 199024), (112, 186585), (120, 174146), (140, 149268), (147, 142160), (168, 124390), (196, 106620), (210, 99512), (240, 87073), (245, 85296), (280, 74634), (294, 71080), (336, 62195), (392, 53310), (420, 49756), (490, 42648), (560, 37317), (588, 35540), (735, 28432), (784, 26655), (840, 24878), (980, 21324), (1176, 17770), (1470, 14216), (1680, 12439), (1777, 11760), (1960, 10662), (2352, 8885), (2940, 7108), (3554, 5880), (3920, 5331)]