21239030

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{523}}^1$

素因数の和:692

約数の個数: 32

約数和(自身を含む): 39840768

約数和(自身を除く): 18601738

約数列:

[1, 2, 5, 10, 31, 62, 131, 155, 262, 310, 523, 655, 1046, 1310, 2615, 4061, 5230, 8122, 16213, 20305, 32426, 40610, 68513, 81065, 137026, 162130, 342565, 685130, 2123903, 4247806, 10619515, 21239030]

約数ペア:

[(1, 21239030), (2, 10619515), (5, 4247806), (10, 2123903), (31, 685130), (62, 342565), (131, 162130), (155, 137026), (262, 81065), (310, 68513), (523, 40610), (655, 32426), (1046, 20305), (1310, 16213), (2615, 8122), (4061, 5230)]