20649645

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{26993}}^1$

素因数の和:27021

約数の個数: 24

約数和(自身を含む): 37899576

約数和(自身を除く): 17249931

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 26993, 80979, 134965, 242937, 404895, 458881, 1214685, 1376643, 2294405, 4129929, 6883215, 20649645]

約数ペア:

[(1, 20649645), (3, 6883215), (5, 4129929), (9, 2294405), (15, 1376643), (17, 1214685), (45, 458881), (51, 404895), (85, 242937), (153, 134965), (255, 80979), (765, 26993)]