21204291213

素因数分解:

$3^4\times 7^3\times {\mathrm{19}}^1\times {\mathrm{40169}}^1$

素因数の和:40221

約数の個数: 80

約数和(自身を含む): 38884560000

約数和(自身を除く): 17680268787

約数列:

[1, 3, 7, 9, 19, 21, 27, 49, 57, 63, 81, 133, 147, 171, 189, 343, 399, 441, 513, 567, 931, 1029, 1197, 1323, 1539, 2793, 3087, 3591, 3969, 6517, 8379, 9261, 10773, 19551, 25137, 27783, 40169, 58653, 75411, 120507, 175959, 281183, 361521, 527877, 763211, 843549, 1084563, 1968281, 2289633, 2530647, 3253689, 5342477, 5904843, 6868899, 7591941, 13777967, 16027431, 17714529, 20606697, 22775823, 37397339, 41333901, 48082293, 53143587, 61820091, 112192017, 124001703, 144246879, 159430761, 261781373, 336576051, 372005109, 432740637, 785344119, 1009728153, 1116015327, 2356032357, 3029184459, 7068097071, 21204291213]

約数ペア:

[(1, 21204291213), (3, 7068097071), (7, 3029184459), (9, 2356032357), (19, 1116015327), (21, 1009728153), (27, 785344119), (49, 432740637), (57, 372005109), (63, 336576051), (81, 261781373), (133, 159430761), (147, 144246879), (171, 124001703), (189, 112192017), (343, 61820091), (399, 53143587), (441, 48082293), (513, 41333901), (567, 37397339), (931, 22775823), (1029, 20606697), (1197, 17714529), (1323, 16027431), (1539, 13777967), (2793, 7591941), (3087, 6868899), (3591, 5904843), (3969, 5342477), (6517, 3253689), (8379, 2530647), (9261, 2289633), (10773, 1968281), (19551, 1084563), (25137, 843549), (27783, 763211), (40169, 527877), (58653, 361521), (75411, 281183), (120507, 175959)]