21256545

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{2689}}^1$

素因数の和:2745

約数の個数: 32

約数和(自身を含む): 37186560

約数和(自身を除く): 15930015

約数列:

[1, 3, 5, 15, 17, 31, 51, 85, 93, 155, 255, 465, 527, 1581, 2635, 2689, 7905, 8067, 13445, 40335, 45713, 83359, 137139, 228565, 250077, 416795, 685695, 1250385, 1417103, 4251309, 7085515, 21256545]

約数ペア:

[(1, 21256545), (3, 7085515), (5, 4251309), (15, 1417103), (17, 1250385), (31, 685695), (51, 416795), (85, 250077), (93, 228565), (155, 137139), (255, 83359), (465, 45713), (527, 40335), (1581, 13445), (2635, 8067), (2689, 7905)]