21149765

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:138

約数の個数: 64

約数和(自身を含む): 34062336

約数和(自身を除く): 12912571

約数列:

[1, 5, 7, 13, 23, 35, 43, 47, 65, 91, 115, 161, 215, 235, 299, 301, 329, 455, 559, 611, 805, 989, 1081, 1495, 1505, 1645, 2021, 2093, 2795, 3055, 3913, 4277, 4945, 5405, 6923, 7567, 10105, 10465, 12857, 14053, 14147, 19565, 21385, 26273, 34615, 37835, 46483, 64285, 70265, 70735, 89999, 98371, 131365, 183911, 232415, 325381, 449995, 491855, 604279, 919555, 1626905, 3021395, 4229953, 21149765]

約数ペア:

[(1, 21149765), (5, 4229953), (7, 3021395), (13, 1626905), (23, 919555), (35, 604279), (43, 491855), (47, 449995), (65, 325381), (91, 232415), (115, 183911), (161, 131365), (215, 98371), (235, 89999), (299, 70735), (301, 70265), (329, 64285), (455, 46483), (559, 37835), (611, 34615), (805, 26273), (989, 21385), (1081, 19565), (1495, 14147), (1505, 14053), (1645, 12857), (2021, 10465), (2093, 10105), (2795, 7567), (3055, 6923), (3913, 5405), (4277, 4945)]