21000455259

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1\times {\mathrm{198851}}^1$

素因数の和:199015

約数の個数: 32

約数和(自身を含む): 32987160576

約数和(自身を除く): 11986705317

約数列:

[1, 3, 7, 21, 47, 107, 141, 321, 329, 749, 987, 2247, 5029, 15087, 35203, 105609, 198851, 596553, 1391957, 4175871, 9345997, 21277057, 28037991, 63831171, 65421979, 148939399, 196265937, 446818197, 1000021679, 3000065037, 7000151753, 21000455259]

約数ペア:

[(1, 21000455259), (3, 7000151753), (7, 3000065037), (21, 1000021679), (47, 446818197), (107, 196265937), (141, 148939399), (321, 65421979), (329, 63831171), (749, 28037991), (987, 21277057), (2247, 9345997), (5029, 4175871), (15087, 1391957), (35203, 596553), (105609, 198851)]