21745312

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{563}}^1$

素因数の和:661

約数の個数: 48

約数和(自身を含む): 46049472

約数和(自身を除く): 24304160

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 71, 136, 142, 272, 284, 544, 563, 568, 1126, 1136, 1207, 2252, 2272, 2414, 4504, 4828, 9008, 9571, 9656, 18016, 19142, 19312, 38284, 38624, 39973, 76568, 79946, 153136, 159892, 306272, 319784, 639568, 679541, 1279136, 1359082, 2718164, 5436328, 10872656, 21745312]

約数ペア:

[(1, 21745312), (2, 10872656), (4, 5436328), (8, 2718164), (16, 1359082), (17, 1279136), (32, 679541), (34, 639568), (68, 319784), (71, 306272), (136, 159892), (142, 153136), (272, 79946), (284, 76568), (544, 39973), (563, 38624), (568, 38284), (1126, 19312), (1136, 19142), (1207, 18016), (2252, 9656), (2272, 9571), (2414, 9008), (4504, 4828)]