21640575

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1543}}^1$

素因数の和:1584

約数の個数: 48

約数和(自身を含む): 41354496

約数和(自身を除く): 19713921

約数列:

[1, 3, 5, 11, 15, 17, 25, 33, 51, 55, 75, 85, 165, 187, 255, 275, 425, 561, 825, 935, 1275, 1543, 2805, 4629, 4675, 7715, 14025, 16973, 23145, 26231, 38575, 50919, 78693, 84865, 115725, 131155, 254595, 288541, 393465, 424325, 655775, 865623, 1272975, 1442705, 1967325, 4328115, 7213525, 21640575]

約数ペア:

[(1, 21640575), (3, 7213525), (5, 4328115), (11, 1967325), (15, 1442705), (17, 1272975), (25, 865623), (33, 655775), (51, 424325), (55, 393465), (75, 288541), (85, 254595), (165, 131155), (187, 115725), (255, 84865), (275, 78693), (425, 50919), (561, 38575), (825, 26231), (935, 23145), (1275, 16973), (1543, 14025), (2805, 7715), (4629, 4675)]