21087540

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{4339}}^1$

素因数の和:4363

約数の個数: 72

約数和(自身を含む): 66349920

約数和(自身を除く): 45262380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 243, 270, 324, 405, 486, 540, 810, 972, 1215, 1620, 2430, 4339, 4860, 8678, 13017, 17356, 21695, 26034, 39051, 43390, 52068, 65085, 78102, 86780, 117153, 130170, 156204, 195255, 234306, 260340, 351459, 390510, 468612, 585765, 702918, 781020, 1054377, 1171530, 1405836, 1757295, 2108754, 2343060, 3514590, 4217508, 5271885, 7029180, 10543770, 21087540]

約数ペア:

[(1, 21087540), (2, 10543770), (3, 7029180), (4, 5271885), (5, 4217508), (6, 3514590), (9, 2343060), (10, 2108754), (12, 1757295), (15, 1405836), (18, 1171530), (20, 1054377), (27, 781020), (30, 702918), (36, 585765), (45, 468612), (54, 390510), (60, 351459), (81, 260340), (90, 234306), (108, 195255), (135, 156204), (162, 130170), (180, 117153), (243, 86780), (270, 78102), (324, 65085), (405, 52068), (486, 43390), (540, 39051), (810, 26034), (972, 21695), (1215, 17356), (1620, 13017), (2430, 8678), (4339, 4860)]