21810825

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 41783040

約数和(自身を除く): 19972215

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 53, 59, 75, 93, 155, 159, 177, 225, 265, 279, 295, 465, 477, 531, 775, 795, 885, 1325, 1395, 1475, 1643, 1829, 2325, 2385, 2655, 3127, 3975, 4425, 4929, 5487, 6975, 8215, 9145, 9381, 11925, 13275, 14787, 15635, 16461, 24645, 27435, 28143, 41075, 45725, 46905, 73935, 78175, 82305, 96937, 123225, 137175, 140715, 234525, 290811, 369675, 411525, 484685, 703575, 872433, 1454055, 2423425, 4362165, 7270275, 21810825]

約数ペア:

[(1, 21810825), (3, 7270275), (5, 4362165), (9, 2423425), (15, 1454055), (25, 872433), (31, 703575), (45, 484685), (53, 411525), (59, 369675), (75, 290811), (93, 234525), (155, 140715), (159, 137175), (177, 123225), (225, 96937), (265, 82305), (279, 78175), (295, 73935), (465, 46905), (477, 45725), (531, 41075), (775, 28143), (795, 27435), (885, 24645), (1325, 16461), (1395, 15635), (1475, 14787), (1643, 13275), (1829, 11925), (2325, 9381), (2385, 9145), (2655, 8215), (3127, 6975), (3975, 5487), (4425, 4929)]