21615255

素因数分解:

$3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^2$

素因数の和:142

約数の個数: 60

約数和(自身を含む): 41570760

約数和(自身を除く): 19955505

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 53, 57, 81, 95, 135, 159, 171, 265, 285, 405, 477, 513, 795, 855, 1007, 1431, 1539, 2385, 2565, 2809, 3021, 4293, 5035, 7155, 7695, 8427, 9063, 14045, 15105, 21465, 25281, 27189, 42135, 45315, 53371, 75843, 81567, 126405, 135945, 160113, 227529, 266855, 379215, 407835, 480339, 800565, 1137645, 1441017, 2401695, 4323051, 7205085, 21615255]

約数ペア:

[(1, 21615255), (3, 7205085), (5, 4323051), (9, 2401695), (15, 1441017), (19, 1137645), (27, 800565), (45, 480339), (53, 407835), (57, 379215), (81, 266855), (95, 227529), (135, 160113), (159, 135945), (171, 126405), (265, 81567), (285, 75843), (405, 53371), (477, 45315), (513, 42135), (795, 27189), (855, 25281), (1007, 21465), (1431, 15105), (1539, 14045), (2385, 9063), (2565, 8427), (2809, 7695), (3021, 7155), (4293, 5035)]