21507975

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5623}}^1$

素因数の和:5656

約数の個数: 36

約数和(自身を含む): 40796496

約数和(自身を除く): 19288521

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5623, 16869, 28115, 50607, 84345, 95591, 140575, 253035, 286773, 421725, 477955, 860319, 1265175, 1433865, 2389775, 4301595, 7169325, 21507975]

約数ペア:

[(1, 21507975), (3, 7169325), (5, 4301595), (9, 2389775), (15, 1433865), (17, 1265175), (25, 860319), (45, 477955), (51, 421725), (75, 286773), (85, 253035), (153, 140575), (225, 95591), (255, 84345), (425, 50607), (765, 28115), (1275, 16869), (3825, 5623)]