81391275

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1667}}^1$

素因数の和:1721

約数の個数: 72

約数和(自身を含む): 172084224

約数和(自身を除く): 90692949

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 31, 35, 45, 63, 75, 93, 105, 155, 175, 217, 225, 279, 315, 465, 525, 651, 775, 1085, 1395, 1575, 1667, 1953, 2325, 3255, 5001, 5425, 6975, 8335, 9765, 11669, 15003, 16275, 25005, 35007, 41675, 48825, 51677, 58345, 75015, 105021, 125025, 155031, 175035, 258385, 291725, 361739, 375075, 465093, 525105, 775155, 875175, 1085217, 1291925, 1808695, 2325465, 2625525, 3255651, 3875775, 5426085, 9043475, 11627325, 16278255, 27130425, 81391275]

約数ペア:

[(1, 81391275), (3, 27130425), (5, 16278255), (7, 11627325), (9, 9043475), (15, 5426085), (21, 3875775), (25, 3255651), (31, 2625525), (35, 2325465), (45, 1808695), (63, 1291925), (75, 1085217), (93, 875175), (105, 775155), (155, 525105), (175, 465093), (217, 375075), (225, 361739), (279, 291725), (315, 258385), (465, 175035), (525, 155031), (651, 125025), (775, 105021), (1085, 75015), (1395, 58345), (1575, 51677), (1667, 48825), (1953, 41675), (2325, 35007), (3255, 25005), (5001, 16275), (5425, 15003), (6975, 11669), (8335, 9765)]