21093237

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:159

約数の個数: 64

約数和(自身を含む): 36864000

約数和(自身を除く): 15770763

約数列:

[1, 3, 9, 11, 27, 29, 31, 33, 79, 87, 93, 99, 237, 261, 279, 297, 319, 341, 711, 783, 837, 869, 899, 957, 1023, 2133, 2291, 2449, 2607, 2697, 2871, 3069, 6873, 7347, 7821, 8091, 8613, 9207, 9889, 20619, 22041, 23463, 24273, 25201, 26939, 29667, 61857, 66123, 71021, 75603, 80817, 89001, 213063, 226809, 242451, 267003, 639189, 680427, 727353, 781231, 1917567, 2343693, 7031079, 21093237]

約数ペア:

[(1, 21093237), (3, 7031079), (9, 2343693), (11, 1917567), (27, 781231), (29, 727353), (31, 680427), (33, 639189), (79, 267003), (87, 242451), (93, 226809), (99, 213063), (237, 89001), (261, 80817), (279, 75603), (297, 71021), (319, 66123), (341, 61857), (711, 29667), (783, 26939), (837, 25201), (869, 24273), (899, 23463), (957, 22041), (1023, 20619), (2133, 9889), (2291, 9207), (2449, 8613), (2607, 8091), (2697, 7821), (2871, 7347), (3069, 6873)]