21097856

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:467

約数の個数: 64

約数和(自身を含む): 46838400

約数和(自身を除く): 25740544

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 64, 104, 124, 128, 208, 248, 403, 409, 416, 496, 806, 818, 832, 992, 1612, 1636, 1664, 1984, 3224, 3272, 3968, 5317, 6448, 6544, 10634, 12679, 12896, 13088, 21268, 25358, 25792, 26176, 42536, 50716, 51584, 52352, 85072, 101432, 164827, 170144, 202864, 329654, 340288, 405728, 659308, 680576, 811456, 1318616, 1622912, 2637232, 5274464, 10548928, 21097856]

約数ペア:

[(1, 21097856), (2, 10548928), (4, 5274464), (8, 2637232), (13, 1622912), (16, 1318616), (26, 811456), (31, 680576), (32, 659308), (52, 405728), (62, 340288), (64, 329654), (104, 202864), (124, 170144), (128, 164827), (208, 101432), (248, 85072), (403, 52352), (409, 51584), (416, 50716), (496, 42536), (806, 26176), (818, 25792), (832, 25358), (992, 21268), (1612, 13088), (1636, 12896), (1664, 12679), (1984, 10634), (3224, 6544), (3272, 6448), (3968, 5317)]