21988395

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1$

素因数の和:122

約数の個数: 128

約数和(自身を含む): 49351680

約数和(自身を除く): 27363285

約数列:

[1, 3, 5, 9, 11, 13, 15, 17, 27, 33, 39, 45, 51, 55, 65, 67, 85, 99, 117, 135, 143, 153, 165, 187, 195, 201, 221, 255, 297, 335, 351, 429, 459, 495, 561, 585, 603, 663, 715, 737, 765, 871, 935, 1005, 1105, 1139, 1287, 1485, 1683, 1755, 1809, 1989, 2145, 2211, 2295, 2431, 2613, 2805, 3015, 3315, 3417, 3685, 3861, 4355, 5049, 5695, 5967, 6435, 6633, 7293, 7839, 8415, 9045, 9581, 9945, 10251, 11055, 12155, 12529, 13065, 14807, 17085, 19305, 19899, 21879, 23517, 25245, 28743, 29835, 30753, 33165, 36465, 37587, 39195, 44421, 47905, 51255, 62645, 65637, 74035, 86229, 99495, 109395, 112761, 117585, 133263, 143715, 153765, 162877, 187935, 222105, 258687, 328185, 338283, 399789, 431145, 488631, 563805, 666315, 814385, 1293435, 1465893, 1691415, 1998945, 2443155, 4397679, 7329465, 21988395]

約数ペア:

[(1, 21988395), (3, 7329465), (5, 4397679), (9, 2443155), (11, 1998945), (13, 1691415), (15, 1465893), (17, 1293435), (27, 814385), (33, 666315), (39, 563805), (45, 488631), (51, 431145), (55, 399789), (65, 338283), (67, 328185), (85, 258687), (99, 222105), (117, 187935), (135, 162877), (143, 153765), (153, 143715), (165, 133263), (187, 117585), (195, 112761), (201, 109395), (221, 99495), (255, 86229), (297, 74035), (335, 65637), (351, 62645), (429, 51255), (459, 47905), (495, 44421), (561, 39195), (585, 37587), (603, 36465), (663, 33165), (715, 30753), (737, 29835), (765, 28743), (871, 25245), (935, 23517), (1005, 21879), (1105, 19899), (1139, 19305), (1287, 17085), (1485, 14807), (1683, 13065), (1755, 12529), (1809, 12155), (1989, 11055), (2145, 10251), (2211, 9945), (2295, 9581), (2431, 9045), (2613, 8415), (2805, 7839), (3015, 7293), (3315, 6633), (3417, 6435), (3685, 5967), (3861, 5695), (4355, 5049)]