21106809

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 34369920

約数和(自身を除く): 13263111

約数列:

[1, 3, 9, 17, 29, 51, 67, 71, 87, 153, 201, 213, 261, 493, 603, 639, 1139, 1207, 1479, 1943, 2059, 3417, 3621, 4437, 4757, 5829, 6177, 10251, 10863, 14271, 17487, 18531, 33031, 35003, 42813, 80869, 99093, 105009, 137953, 242607, 297279, 315027, 413859, 727821, 1241577, 2345201, 7035603, 21106809]

約数ペア:

[(1, 21106809), (3, 7035603), (9, 2345201), (17, 1241577), (29, 727821), (51, 413859), (67, 315027), (71, 297279), (87, 242607), (153, 137953), (201, 105009), (213, 99093), (261, 80869), (493, 42813), (603, 35003), (639, 33031), (1139, 18531), (1207, 17487), (1479, 14271), (1943, 10863), (2059, 10251), (3417, 6177), (3621, 5829), (4437, 4757)]