21373947

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{2851}}^1$

素因数の和:2888

約数の個数: 36

約数和(自身を含む): 38039976

約数和(自身を除く): 16666029

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 63, 119, 147, 153, 357, 441, 833, 1071, 2499, 2851, 7497, 8553, 19957, 25659, 48467, 59871, 139699, 145401, 179613, 339269, 419097, 436203, 1017807, 1257291, 2374883, 3053421, 7124649, 21373947]

約数ペア:

[(1, 21373947), (3, 7124649), (7, 3053421), (9, 2374883), (17, 1257291), (21, 1017807), (49, 436203), (51, 419097), (63, 339269), (119, 179613), (147, 145401), (153, 139699), (357, 59871), (441, 48467), (833, 25659), (1071, 19957), (2499, 8553), (2851, 7497)]