21000388647

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{591377}}^1$

素因数の和:591495

約数の個数: 32

約数和(自身を含む): 34063372800

約数和(自身を除く): 13062984153

約数列:

[1, 3, 7, 19, 21, 57, 89, 133, 267, 399, 623, 1691, 1869, 5073, 11837, 35511, 591377, 1774131, 4139639, 11236163, 12418917, 33708489, 52632553, 78653141, 157897659, 235959423, 368427871, 1000018507, 1105283613, 3000055521, 7000129549, 21000388647]

約数ペア:

[(1, 21000388647), (3, 7000129549), (7, 3000055521), (19, 1105283613), (21, 1000018507), (57, 368427871), (89, 235959423), (133, 157897659), (267, 78653141), (399, 52632553), (623, 33708489), (1691, 12418917), (1869, 11236163), (5073, 4139639), (11837, 1774131), (35511, 591377)]