20713725

素因数分解:

$3^4\times 5^2\times {\mathrm{53}}^1\times {\mathrm{193}}^1$

素因数の和:268

約数の個数: 60

約数和(自身を含む): 39295476

約数和(自身を除く): 18581751

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 53, 75, 81, 135, 159, 193, 225, 265, 405, 477, 579, 675, 795, 965, 1325, 1431, 1737, 2025, 2385, 2895, 3975, 4293, 4825, 5211, 7155, 8685, 10229, 11925, 14475, 15633, 21465, 26055, 30687, 35775, 43425, 51145, 78165, 92061, 107325, 130275, 153435, 255725, 276183, 390825, 460305, 767175, 828549, 1380915, 2301525, 4142745, 6904575, 20713725]

約数ペア:

[(1, 20713725), (3, 6904575), (5, 4142745), (9, 2301525), (15, 1380915), (25, 828549), (27, 767175), (45, 460305), (53, 390825), (75, 276183), (81, 255725), (135, 153435), (159, 130275), (193, 107325), (225, 92061), (265, 78165), (405, 51145), (477, 43425), (579, 35775), (675, 30687), (795, 26055), (965, 21465), (1325, 15633), (1431, 14475), (1737, 11925), (2025, 10229), (2385, 8685), (2895, 7155), (3975, 5211), (4293, 4825)]