21000398517

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2129}}^1\times {\mathrm{5399}}^1$

素因数の和:7570

約数の個数: 48

約数和(自身を含む): 35886240000

約数和(自身を除く): 14885841483

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 2129, 5399, 6387, 14903, 16197, 19161, 37793, 44709, 48591, 61741, 113379, 134127, 156571, 185223, 340137, 432187, 469713, 555669, 1095997, 1296561, 1409139, 3287991, 3889683, 9863973, 11494471, 34483413, 80461297, 103450239, 241383891, 333339659, 724151673, 1000018977, 2333377613, 3000056931, 7000132839, 21000398517]

約数ペア:

[(1, 21000398517), (3, 7000132839), (7, 3000056931), (9, 2333377613), (21, 1000018977), (29, 724151673), (63, 333339659), (87, 241383891), (203, 103450239), (261, 80461297), (609, 34483413), (1827, 11494471), (2129, 9863973), (5399, 3889683), (6387, 3287991), (14903, 1409139), (16197, 1296561), (19161, 1095997), (37793, 555669), (44709, 469713), (48591, 432187), (61741, 340137), (113379, 185223), (134127, 156571)]