21129104

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{1039}}^1$

素因数の和:1119

約数の個数: 40

約数和(自身を含む): 43330560

約数和(自身を除く): 22201456

約数列:

[1, 2, 4, 8, 16, 31, 41, 62, 82, 124, 164, 248, 328, 496, 656, 1039, 1271, 2078, 2542, 4156, 5084, 8312, 10168, 16624, 20336, 32209, 42599, 64418, 85198, 128836, 170396, 257672, 340792, 515344, 681584, 1320569, 2641138, 5282276, 10564552, 21129104]

約数ペア:

[(1, 21129104), (2, 10564552), (4, 5282276), (8, 2641138), (16, 1320569), (31, 681584), (41, 515344), (62, 340792), (82, 257672), (124, 170396), (164, 128836), (248, 85198), (328, 64418), (496, 42599), (656, 32209), (1039, 20336), (1271, 16624), (2078, 10168), (2542, 8312), (4156, 5084)]