20791440

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{431}}^1$

素因数の和:517

約数の個数: 120

約数和(自身を含む): 71031168

約数和(自身を除く): 50239728

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 67, 72, 80, 90, 120, 134, 144, 180, 201, 240, 268, 335, 360, 402, 431, 536, 603, 670, 720, 804, 862, 1005, 1072, 1206, 1293, 1340, 1608, 1724, 2010, 2155, 2412, 2586, 2680, 3015, 3216, 3448, 3879, 4020, 4310, 4824, 5172, 5360, 6030, 6465, 6896, 7758, 8040, 8620, 9648, 10344, 12060, 12930, 15516, 16080, 17240, 19395, 20688, 24120, 25860, 28877, 31032, 34480, 38790, 48240, 51720, 57754, 62064, 77580, 86631, 103440, 115508, 144385, 155160, 173262, 231016, 259893, 288770, 310320, 346524, 433155, 462032, 519786, 577540, 693048, 866310, 1039572, 1155080, 1299465, 1386096, 1732620, 2079144, 2310160, 2598930, 3465240, 4158288, 5197860, 6930480, 10395720, 20791440]

約数ペア:

[(1, 20791440), (2, 10395720), (3, 6930480), (4, 5197860), (5, 4158288), (6, 3465240), (8, 2598930), (9, 2310160), (10, 2079144), (12, 1732620), (15, 1386096), (16, 1299465), (18, 1155080), (20, 1039572), (24, 866310), (30, 693048), (36, 577540), (40, 519786), (45, 462032), (48, 433155), (60, 346524), (67, 310320), (72, 288770), (80, 259893), (90, 231016), (120, 173262), (134, 155160), (144, 144385), (180, 115508), (201, 103440), (240, 86631), (268, 77580), (335, 62064), (360, 57754), (402, 51720), (431, 48240), (536, 38790), (603, 34480), (670, 31032), (720, 28877), (804, 25860), (862, 24120), (1005, 20688), (1072, 19395), (1206, 17240), (1293, 16080), (1340, 15516), (1608, 12930), (1724, 12060), (2010, 10344), (2155, 9648), (2412, 8620), (2586, 8040), (2680, 7758), (3015, 6896), (3216, 6465), (3448, 6030), (3879, 5360), (4020, 5172), (4310, 4824)]