21165255

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{379}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 39480480

約数和(自身を除く): 18315225

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 73, 85, 153, 219, 255, 365, 379, 657, 765, 1095, 1137, 1241, 1895, 3285, 3411, 3723, 5685, 6205, 6443, 11169, 17055, 18615, 19329, 27667, 32215, 55845, 57987, 83001, 96645, 138335, 249003, 289935, 415005, 470339, 1245015, 1411017, 2351695, 4233051, 7055085, 21165255]

約数ペア:

[(1, 21165255), (3, 7055085), (5, 4233051), (9, 2351695), (15, 1411017), (17, 1245015), (45, 470339), (51, 415005), (73, 289935), (85, 249003), (153, 138335), (219, 96645), (255, 83001), (365, 57987), (379, 55845), (657, 32215), (765, 27667), (1095, 19329), (1137, 18615), (1241, 17055), (1895, 11169), (3285, 6443), (3411, 6205), (3723, 5685)]