21994784

素因数分解:

$2^5\times 7^1\times {\mathrm{149}}^1\times {\mathrm{659}}^1$

素因数の和:825

約数の個数: 48

約数和(自身を含む): 49896000

約数和(自身を除く): 27901216

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 149, 224, 298, 596, 659, 1043, 1192, 1318, 2086, 2384, 2636, 4172, 4613, 4768, 5272, 8344, 9226, 10544, 16688, 18452, 21088, 33376, 36904, 73808, 98191, 147616, 196382, 392764, 687337, 785528, 1374674, 1571056, 2749348, 3142112, 5498696, 10997392, 21994784]

約数ペア:

[(1, 21994784), (2, 10997392), (4, 5498696), (7, 3142112), (8, 2749348), (14, 1571056), (16, 1374674), (28, 785528), (32, 687337), (56, 392764), (112, 196382), (149, 147616), (224, 98191), (298, 73808), (596, 36904), (659, 33376), (1043, 21088), (1192, 18452), (1318, 16688), (2086, 10544), (2384, 9226), (2636, 8344), (4172, 5272), (4613, 4768)]