21987315

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{439}}^1$

素因数の和:513

約数の個数: 64

約数和(自身を含む): 45619200

約数和(自身を除く): 23631885

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 53, 63, 105, 135, 159, 189, 265, 315, 371, 439, 477, 795, 945, 1113, 1317, 1431, 1855, 2195, 2385, 3073, 3339, 3951, 5565, 6585, 7155, 9219, 10017, 11853, 15365, 16695, 19755, 23267, 27657, 46095, 50085, 59265, 69801, 82971, 116335, 138285, 162869, 209403, 349005, 414855, 488607, 628209, 814345, 1047015, 1465821, 2443035, 3141045, 4397463, 7329105, 21987315]

約数ペア:

[(1, 21987315), (3, 7329105), (5, 4397463), (7, 3141045), (9, 2443035), (15, 1465821), (21, 1047015), (27, 814345), (35, 628209), (45, 488607), (53, 414855), (63, 349005), (105, 209403), (135, 162869), (159, 138285), (189, 116335), (265, 82971), (315, 69801), (371, 59265), (439, 50085), (477, 46095), (795, 27657), (945, 23267), (1113, 19755), (1317, 16695), (1431, 15365), (1855, 11853), (2195, 10017), (2385, 9219), (3073, 7155), (3339, 6585), (3951, 5565)]