20641995

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{223}}^1$

素因数の和:273

約数の個数: 72

約数和(自身を含む): 41827968

約数和(自身を除く): 21185973

約数列:

[1, 3, 5, 9, 11, 15, 17, 33, 45, 51, 55, 85, 99, 121, 153, 165, 187, 223, 255, 363, 495, 561, 605, 669, 765, 935, 1089, 1115, 1683, 1815, 2007, 2057, 2453, 2805, 3345, 3791, 5445, 6171, 7359, 8415, 10035, 10285, 11373, 12265, 18513, 18955, 22077, 26983, 30855, 34119, 36795, 41701, 56865, 80949, 92565, 110385, 125103, 134915, 170595, 208505, 242847, 375309, 404745, 458711, 625515, 1214235, 1376133, 1876545, 2293555, 4128399, 6880665, 20641995]

約数ペア:

[(1, 20641995), (3, 6880665), (5, 4128399), (9, 2293555), (11, 1876545), (15, 1376133), (17, 1214235), (33, 625515), (45, 458711), (51, 404745), (55, 375309), (85, 242847), (99, 208505), (121, 170595), (153, 134915), (165, 125103), (187, 110385), (223, 92565), (255, 80949), (363, 56865), (495, 41701), (561, 36795), (605, 34119), (669, 30855), (765, 26983), (935, 22077), (1089, 18955), (1115, 18513), (1683, 12265), (1815, 11373), (2007, 10285), (2057, 10035), (2453, 8415), (2805, 7359), (3345, 6171), (3791, 5445)]