21294675

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:161

約数の個数: 72

約数和(自身を含む): 40854528

約数和(自身を除く): 19559853

約数列:

[1, 3, 5, 9, 15, 25, 31, 43, 45, 71, 75, 93, 129, 155, 213, 215, 225, 279, 355, 387, 465, 639, 645, 775, 1065, 1075, 1333, 1395, 1775, 1935, 2201, 2325, 3053, 3195, 3225, 3999, 5325, 6603, 6665, 6975, 9159, 9675, 11005, 11997, 15265, 15975, 19809, 19995, 27477, 33015, 33325, 45795, 55025, 59985, 76325, 94643, 99045, 99975, 137385, 165075, 228975, 283929, 299925, 473215, 495225, 686925, 851787, 1419645, 2366075, 4258935, 7098225, 21294675]

約数ペア:

[(1, 21294675), (3, 7098225), (5, 4258935), (9, 2366075), (15, 1419645), (25, 851787), (31, 686925), (43, 495225), (45, 473215), (71, 299925), (75, 283929), (93, 228975), (129, 165075), (155, 137385), (213, 99975), (215, 99045), (225, 94643), (279, 76325), (355, 59985), (387, 55025), (465, 45795), (639, 33325), (645, 33015), (775, 27477), (1065, 19995), (1075, 19809), (1333, 15975), (1395, 15265), (1775, 11997), (1935, 11005), (2201, 9675), (2325, 9159), (3053, 6975), (3195, 6665), (3225, 6603), (3999, 5325)]