21105280

素因数分解:

$2^7\times 5^1\times 7^2\times {\mathrm{673}}^1$

素因数の和:706

約数の個数: 96

約数和(自身を含む): 58779540

約数和(自身を除く): 37674260

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 280, 320, 392, 448, 490, 560, 640, 673, 784, 896, 980, 1120, 1346, 1568, 1960, 2240, 2692, 3136, 3365, 3920, 4480, 4711, 5384, 6272, 6730, 7840, 9422, 10768, 13460, 15680, 18844, 21536, 23555, 26920, 31360, 32977, 37688, 43072, 47110, 53840, 65954, 75376, 86144, 94220, 107680, 131908, 150752, 164885, 188440, 215360, 263816, 301504, 329770, 376880, 430720, 527632, 603008, 659540, 753760, 1055264, 1319080, 1507520, 2110528, 2638160, 3015040, 4221056, 5276320, 10552640, 21105280]

約数ペア:

[(1, 21105280), (2, 10552640), (4, 5276320), (5, 4221056), (7, 3015040), (8, 2638160), (10, 2110528), (14, 1507520), (16, 1319080), (20, 1055264), (28, 753760), (32, 659540), (35, 603008), (40, 527632), (49, 430720), (56, 376880), (64, 329770), (70, 301504), (80, 263816), (98, 215360), (112, 188440), (128, 164885), (140, 150752), (160, 131908), (196, 107680), (224, 94220), (245, 86144), (280, 75376), (320, 65954), (392, 53840), (448, 47110), (490, 43072), (560, 37688), (640, 32977), (673, 31360), (784, 26920), (896, 23555), (980, 21536), (1120, 18844), (1346, 15680), (1568, 13460), (1960, 10768), (2240, 9422), (2692, 7840), (3136, 6730), (3365, 6272), (3920, 5384), (4480, 4711)]