81340425

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{359}}^1$

素因数の和:447

約数の個数: 72

約数和(自身を含む): 156686400

約数和(自身を除く): 75345975

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 53, 57, 75, 95, 159, 171, 225, 265, 285, 359, 475, 477, 795, 855, 1007, 1077, 1325, 1425, 1795, 2385, 3021, 3231, 3975, 4275, 5035, 5385, 6821, 8975, 9063, 11925, 15105, 16155, 19027, 20463, 25175, 26925, 34105, 45315, 57081, 61389, 75525, 80775, 95135, 102315, 170525, 171243, 226575, 285405, 306945, 361513, 475675, 511575, 856215, 1084539, 1427025, 1534725, 1807565, 3253617, 4281075, 5422695, 9037825, 16268085, 27113475, 81340425]

約数ペア:

[(1, 81340425), (3, 27113475), (5, 16268085), (9, 9037825), (15, 5422695), (19, 4281075), (25, 3253617), (45, 1807565), (53, 1534725), (57, 1427025), (75, 1084539), (95, 856215), (159, 511575), (171, 475675), (225, 361513), (265, 306945), (285, 285405), (359, 226575), (475, 171243), (477, 170525), (795, 102315), (855, 95135), (1007, 80775), (1077, 75525), (1325, 61389), (1425, 57081), (1795, 45315), (2385, 34105), (3021, 26925), (3231, 25175), (3975, 20463), (4275, 19027), (5035, 16155), (5385, 15105), (6821, 11925), (8975, 9063)]