20956995

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:197

約数の個数: 64

約数和(自身を含む): 39657600

約数和(自身を除く): 18700605

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 53, 87, 101, 135, 145, 159, 261, 265, 303, 435, 477, 505, 783, 795, 909, 1305, 1431, 1515, 1537, 2385, 2727, 2929, 3915, 4545, 4611, 5353, 7155, 7685, 8787, 13635, 13833, 14645, 16059, 23055, 26361, 26765, 41499, 43935, 48177, 69165, 79083, 80295, 131805, 144531, 155237, 207495, 240885, 395415, 465711, 722655, 776185, 1397133, 2328555, 4191399, 6985665, 20956995]

約数ペア:

[(1, 20956995), (3, 6985665), (5, 4191399), (9, 2328555), (15, 1397133), (27, 776185), (29, 722655), (45, 465711), (53, 395415), (87, 240885), (101, 207495), (135, 155237), (145, 144531), (159, 131805), (261, 80295), (265, 79083), (303, 69165), (435, 48177), (477, 43935), (505, 41499), (783, 26765), (795, 26361), (909, 23055), (1305, 16059), (1431, 14645), (1515, 13833), (1537, 13635), (2385, 8787), (2727, 7685), (2929, 7155), (3915, 5353), (4545, 4611)]