19995525

素因数分解:

$3^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{2693}}^1$

素因数の和:2723

約数の個数: 48

約数和(自身を含む): 40086720

約数和(自身を除く): 20091195

約数列:

[1, 3, 5, 9, 11, 15, 25, 27, 33, 45, 55, 75, 99, 135, 165, 225, 275, 297, 495, 675, 825, 1485, 2475, 2693, 7425, 8079, 13465, 24237, 29623, 40395, 67325, 72711, 88869, 121185, 148115, 201975, 266607, 363555, 444345, 605925, 740575, 799821, 1333035, 1817775, 2221725, 3999105, 6665175, 19995525]

約数ペア:

[(1, 19995525), (3, 6665175), (5, 3999105), (9, 2221725), (11, 1817775), (15, 1333035), (25, 799821), (27, 740575), (33, 605925), (45, 444345), (55, 363555), (75, 266607), (99, 201975), (135, 148115), (165, 121185), (225, 88869), (275, 72711), (297, 67325), (495, 40395), (675, 29623), (825, 24237), (1485, 13465), (2475, 8079), (2693, 7425)]