21405375

素因数分解:

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

素因数の和:433

約数の個数: 48

約数和(自身を含む): 39424320

約数和(自身を除く): 18018945

約数列:

[1, 3, 5, 9, 15, 25, 45, 53, 75, 125, 159, 225, 265, 359, 375, 477, 795, 1077, 1125, 1325, 1795, 2385, 3231, 3975, 5385, 6625, 8975, 11925, 16155, 19027, 19875, 26925, 44875, 57081, 59625, 80775, 95135, 134625, 171243, 285405, 403875, 475675, 856215, 1427025, 2378375, 4281075, 7135125, 21405375]

約数ペア:

[(1, 21405375), (3, 7135125), (5, 4281075), (9, 2378375), (15, 1427025), (25, 856215), (45, 475675), (53, 403875), (75, 285405), (125, 171243), (159, 134625), (225, 95135), (265, 80775), (359, 59625), (375, 57081), (477, 44875), (795, 26925), (1077, 19875), (1125, 19027), (1325, 16155), (1795, 11925), (2385, 8975), (3231, 6625), (3975, 5385)]