20639619

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1$

素因数の和:145

約数の個数: 96

約数和(自身を含む): 41932800

約数和(自身を除く): 21293181

約数列:

[1, 3, 7, 9, 11, 13, 21, 29, 33, 39, 63, 77, 79, 87, 91, 99, 117, 143, 203, 231, 237, 261, 273, 319, 377, 429, 553, 609, 693, 711, 819, 869, 957, 1001, 1027, 1131, 1287, 1659, 1827, 2233, 2291, 2607, 2639, 2871, 3003, 3081, 3393, 4147, 4977, 6083, 6699, 6873, 7189, 7821, 7917, 9009, 9243, 11297, 12441, 16037, 18249, 20097, 20619, 21567, 23751, 25201, 29029, 29783, 33891, 37323, 48111, 54747, 64701, 75603, 79079, 87087, 89349, 101673, 144333, 176407, 208481, 226809, 237237, 261261, 268047, 327613, 529221, 625443, 711711, 982839, 1587663, 1876329, 2293291, 2948517, 6879873, 20639619]

約数ペア:

[(1, 20639619), (3, 6879873), (7, 2948517), (9, 2293291), (11, 1876329), (13, 1587663), (21, 982839), (29, 711711), (33, 625443), (39, 529221), (63, 327613), (77, 268047), (79, 261261), (87, 237237), (91, 226809), (99, 208481), (117, 176407), (143, 144333), (203, 101673), (231, 89349), (237, 87087), (261, 79079), (273, 75603), (319, 64701), (377, 54747), (429, 48111), (553, 37323), (609, 33891), (693, 29783), (711, 29029), (819, 25201), (869, 23751), (957, 21567), (1001, 20619), (1027, 20097), (1131, 18249), (1287, 16037), (1659, 12441), (1827, 11297), (2233, 9243), (2291, 9009), (2607, 7917), (2639, 7821), (2871, 7189), (3003, 6873), (3081, 6699), (3393, 6083), (4147, 4977)]