31391775

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{283}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 61804080

約数和(自身を除く): 30412305

約数列:

[1, 3, 5, 9, 15, 17, 25, 29, 45, 51, 75, 85, 87, 145, 153, 225, 255, 261, 283, 425, 435, 493, 725, 765, 849, 1275, 1305, 1415, 1479, 2175, 2465, 2547, 3825, 4245, 4437, 4811, 6525, 7075, 7395, 8207, 12325, 12735, 14433, 21225, 22185, 24055, 24621, 36975, 41035, 43299, 63675, 72165, 73863, 110925, 120275, 123105, 139519, 205175, 216495, 360825, 369315, 418557, 615525, 697595, 1082475, 1255671, 1846575, 2092785, 3487975, 6278355, 10463925, 31391775]

約数ペア:

[(1, 31391775), (3, 10463925), (5, 6278355), (9, 3487975), (15, 2092785), (17, 1846575), (25, 1255671), (29, 1082475), (45, 697595), (51, 615525), (75, 418557), (85, 369315), (87, 360825), (145, 216495), (153, 205175), (225, 139519), (255, 123105), (261, 120275), (283, 110925), (425, 73863), (435, 72165), (493, 63675), (725, 43299), (765, 41035), (849, 36975), (1275, 24621), (1305, 24055), (1415, 22185), (1479, 21225), (2175, 14433), (2465, 12735), (2547, 12325), (3825, 8207), (4245, 7395), (4437, 7075), (4811, 6525)]