21996639

素因数分解:

$3^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{1609}}^1$

素因数の和:1660

約数の個数: 36

約数和(自身を含む): 38176320

約数和(自身を除く): 16179681

約数列:

[1, 3, 7, 9, 21, 31, 49, 63, 93, 147, 217, 279, 441, 651, 1519, 1609, 1953, 4557, 4827, 11263, 13671, 14481, 33789, 49879, 78841, 101367, 149637, 236523, 349153, 448911, 709569, 1047459, 2444071, 3142377, 7332213, 21996639]

約数ペア:

[(1, 21996639), (3, 7332213), (7, 3142377), (9, 2444071), (21, 1047459), (31, 709569), (49, 448911), (63, 349153), (93, 236523), (147, 149637), (217, 101367), (279, 78841), (441, 49879), (651, 33789), (1519, 14481), (1609, 13671), (1953, 11263), (4557, 4827)]