19866825

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{349}}^1$

素因数の和:399

約数の個数: 72

約数和(自身を含む): 40622400

約数和(自身を除く): 20755575

約数列:

[1, 3, 5, 9, 11, 15, 23, 25, 33, 45, 55, 69, 75, 99, 115, 165, 207, 225, 253, 275, 345, 349, 495, 575, 759, 825, 1035, 1047, 1265, 1725, 1745, 2277, 2475, 3141, 3795, 3839, 5175, 5235, 6325, 8027, 8725, 11385, 11517, 15705, 18975, 19195, 24081, 26175, 34551, 40135, 56925, 57585, 72243, 78525, 88297, 95975, 120405, 172755, 200675, 264891, 287925, 361215, 441485, 602025, 794673, 863775, 1324455, 1806075, 2207425, 3973365, 6622275, 19866825]

約数ペア:

[(1, 19866825), (3, 6622275), (5, 3973365), (9, 2207425), (11, 1806075), (15, 1324455), (23, 863775), (25, 794673), (33, 602025), (45, 441485), (55, 361215), (69, 287925), (75, 264891), (99, 200675), (115, 172755), (165, 120405), (207, 95975), (225, 88297), (253, 78525), (275, 72243), (345, 57585), (349, 56925), (495, 40135), (575, 34551), (759, 26175), (825, 24081), (1035, 19195), (1047, 18975), (1265, 15705), (1725, 11517), (1745, 11385), (2277, 8725), (2475, 8027), (3141, 6325), (3795, 5235), (3839, 5175)]