20745480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{24697}}^1$

素因数の和:24718

約数の個数: 64

約数和(自身を含む): 71130240

約数和(自身を除く): 50384760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 24697, 49394, 74091, 98788, 123485, 148182, 172879, 197576, 246970, 296364, 345758, 370455, 493940, 518637, 592728, 691516, 740910, 864395, 987880, 1037274, 1383032, 1481820, 1728790, 2074548, 2593185, 2963640, 3457580, 4149096, 5186370, 6915160, 10372740, 20745480]

約数ペア:

[(1, 20745480), (2, 10372740), (3, 6915160), (4, 5186370), (5, 4149096), (6, 3457580), (7, 2963640), (8, 2593185), (10, 2074548), (12, 1728790), (14, 1481820), (15, 1383032), (20, 1037274), (21, 987880), (24, 864395), (28, 740910), (30, 691516), (35, 592728), (40, 518637), (42, 493940), (56, 370455), (60, 345758), (70, 296364), (84, 246970), (105, 197576), (120, 172879), (140, 148182), (168, 123485), (210, 98788), (280, 74091), (420, 49394), (840, 24697)]