20800500

素因数分解:

$2^2\times 3^1\times 5^3\times 7^2\times {\mathrm{283}}^1$

素因数の和:319

約数の個数: 144

約数和(自身を含む): 70709184

約数和(自身を除く): 49908684

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 49, 50, 60, 70, 75, 84, 98, 100, 105, 125, 140, 147, 150, 175, 196, 210, 245, 250, 283, 294, 300, 350, 375, 420, 490, 500, 525, 566, 588, 700, 735, 750, 849, 875, 980, 1050, 1132, 1225, 1415, 1470, 1500, 1698, 1750, 1981, 2100, 2450, 2625, 2830, 2940, 3396, 3500, 3675, 3962, 4245, 4900, 5250, 5660, 5943, 6125, 7075, 7350, 7924, 8490, 9905, 10500, 11886, 12250, 13867, 14150, 14700, 16980, 18375, 19810, 21225, 23772, 24500, 27734, 28300, 29715, 35375, 36750, 39620, 41601, 42450, 49525, 55468, 59430, 69335, 70750, 73500, 83202, 84900, 99050, 106125, 118860, 138670, 141500, 148575, 166404, 198100, 208005, 212250, 247625, 277340, 297150, 346675, 416010, 424500, 495250, 594300, 693350, 742875, 832020, 990500, 1040025, 1386700, 1485750, 1733375, 2080050, 2971500, 3466750, 4160100, 5200125, 6933500, 10400250, 20800500]

約数ペア:

[(1, 20800500), (2, 10400250), (3, 6933500), (4, 5200125), (5, 4160100), (6, 3466750), (7, 2971500), (10, 2080050), (12, 1733375), (14, 1485750), (15, 1386700), (20, 1040025), (21, 990500), (25, 832020), (28, 742875), (30, 693350), (35, 594300), (42, 495250), (49, 424500), (50, 416010), (60, 346675), (70, 297150), (75, 277340), (84, 247625), (98, 212250), (100, 208005), (105, 198100), (125, 166404), (140, 148575), (147, 141500), (150, 138670), (175, 118860), (196, 106125), (210, 99050), (245, 84900), (250, 83202), (283, 73500), (294, 70750), (300, 69335), (350, 59430), (375, 55468), (420, 49525), (490, 42450), (500, 41601), (525, 39620), (566, 36750), (588, 35375), (700, 29715), (735, 28300), (750, 27734), (849, 24500), (875, 23772), (980, 21225), (1050, 19810), (1132, 18375), (1225, 16980), (1415, 14700), (1470, 14150), (1500, 13867), (1698, 12250), (1750, 11886), (1981, 10500), (2100, 9905), (2450, 8490), (2625, 7924), (2830, 7350), (2940, 7075), (3396, 6125), (3500, 5943), (3675, 5660), (3962, 5250), (4245, 4900)]