21261380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7993}}^1$

素因数の和:8028

約数の個数: 48

約数和(自身を含む): 53719680

約数和(自身を除く): 32458300

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7993, 15986, 31972, 39965, 55951, 79930, 111902, 151867, 159860, 223804, 279755, 303734, 559510, 607468, 759335, 1063069, 1119020, 1518670, 2126138, 3037340, 4252276, 5315345, 10630690, 21261380]

約数ペア:

[(1, 21261380), (2, 10630690), (4, 5315345), (5, 4252276), (7, 3037340), (10, 2126138), (14, 1518670), (19, 1119020), (20, 1063069), (28, 759335), (35, 607468), (38, 559510), (70, 303734), (76, 279755), (95, 223804), (133, 159860), (140, 151867), (190, 111902), (266, 79930), (380, 55951), (532, 39965), (665, 31972), (1330, 15986), (2660, 7993)]