21716864

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{421}}^1$

素因数の和:479

約数の個数: 64

約数和(自身を含む): 48209280

約数和(自身を除く): 26492416

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 64, 104, 124, 128, 208, 248, 403, 416, 421, 496, 806, 832, 842, 992, 1612, 1664, 1684, 1984, 3224, 3368, 3968, 5473, 6448, 6736, 10946, 12896, 13051, 13472, 21892, 25792, 26102, 26944, 43784, 51584, 52204, 53888, 87568, 104408, 169663, 175136, 208816, 339326, 350272, 417632, 678652, 700544, 835264, 1357304, 1670528, 2714608, 5429216, 10858432, 21716864]

約数ペア:

[(1, 21716864), (2, 10858432), (4, 5429216), (8, 2714608), (13, 1670528), (16, 1357304), (26, 835264), (31, 700544), (32, 678652), (52, 417632), (62, 350272), (64, 339326), (104, 208816), (124, 175136), (128, 169663), (208, 104408), (248, 87568), (403, 53888), (416, 52204), (421, 51584), (496, 43784), (806, 26944), (832, 26102), (842, 25792), (992, 21892), (1612, 13472), (1664, 13051), (1684, 12896), (1984, 10946), (3224, 6736), (3368, 6448), (3968, 5473)]