21263775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{193}}^1$

素因数の和:332

約数の個数: 48

約数和(自身を含む): 38393376

約数和(自身を除く): 17129601

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 113, 193, 195, 325, 339, 565, 579, 965, 975, 1469, 1695, 2509, 2825, 2895, 4407, 4825, 7345, 7527, 8475, 12545, 14475, 21809, 22035, 36725, 37635, 62725, 65427, 109045, 110175, 188175, 283517, 327135, 545225, 850551, 1417585, 1635675, 4252755, 7087925, 21263775]

約数ペア:

[(1, 21263775), (3, 7087925), (5, 4252755), (13, 1635675), (15, 1417585), (25, 850551), (39, 545225), (65, 327135), (75, 283517), (113, 188175), (193, 110175), (195, 109045), (325, 65427), (339, 62725), (565, 37635), (579, 36725), (965, 22035), (975, 21809), (1469, 14475), (1695, 12545), (2509, 8475), (2825, 7527), (2895, 7345), (4407, 4825)]