21620340

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{17159}}^1$

素因数の和:17181

約数の個数: 72

約数和(自身を含む): 74954880

約数和(自身を除く): 53334540

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 17159, 34318, 51477, 68636, 85795, 102954, 120113, 154431, 171590, 205908, 240226, 257385, 308862, 343180, 360339, 480452, 514770, 600565, 617724, 720678, 772155, 1029540, 1081017, 1201130, 1441356, 1544310, 1801695, 2162034, 2402260, 3088620, 3603390, 4324068, 5405085, 7206780, 10810170, 21620340]

約数ペア:

[(1, 21620340), (2, 10810170), (3, 7206780), (4, 5405085), (5, 4324068), (6, 3603390), (7, 3088620), (9, 2402260), (10, 2162034), (12, 1801695), (14, 1544310), (15, 1441356), (18, 1201130), (20, 1081017), (21, 1029540), (28, 772155), (30, 720678), (35, 617724), (36, 600565), (42, 514770), (45, 480452), (60, 360339), (63, 343180), (70, 308862), (84, 257385), (90, 240226), (105, 205908), (126, 171590), (140, 154431), (180, 120113), (210, 102954), (252, 85795), (315, 68636), (420, 51477), (630, 34318), (1260, 17159)]