20913417

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{283}}^1$

素因数の和:339

約数の個数: 64

約数和(自身を含む): 39260160

約数和(自身を除く): 18346743

約数列:

[1, 3, 7, 9, 17, 21, 23, 27, 51, 63, 69, 119, 153, 161, 189, 207, 283, 357, 391, 459, 483, 621, 849, 1071, 1173, 1449, 1981, 2547, 2737, 3213, 3519, 4347, 4811, 5943, 6509, 7641, 8211, 10557, 14433, 17829, 19527, 24633, 33677, 43299, 45563, 53487, 58581, 73899, 101031, 110653, 129897, 136689, 175743, 303093, 331959, 410067, 774571, 909279, 995877, 1230201, 2323713, 2987631, 6971139, 20913417]

約数ペア:

[(1, 20913417), (3, 6971139), (7, 2987631), (9, 2323713), (17, 1230201), (21, 995877), (23, 909279), (27, 774571), (51, 410067), (63, 331959), (69, 303093), (119, 175743), (153, 136689), (161, 129897), (189, 110653), (207, 101031), (283, 73899), (357, 58581), (391, 53487), (459, 45563), (483, 43299), (621, 33677), (849, 24633), (1071, 19527), (1173, 17829), (1449, 14433), (1981, 10557), (2547, 8211), (2737, 7641), (3213, 6509), (3519, 5943), (4347, 4811)]