21000724719

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1249}}^1\times {\mathrm{22691}}^1$

素因数の和:23975

約数の個数: 32

約数和(自身を含む): 31768800000

約数和(自身を除く): 10768075281

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 1249, 3747, 16237, 22691, 23731, 48711, 68073, 71193, 294983, 308503, 431129, 884949, 925509, 1293387, 5604677, 16814031, 28341059, 85023177, 368433767, 538480121, 1105301301, 1615440363, 7000241573, 21000724719]

約数ペア:

[(1, 21000724719), (3, 7000241573), (13, 1615440363), (19, 1105301301), (39, 538480121), (57, 368433767), (247, 85023177), (741, 28341059), (1249, 16814031), (3747, 5604677), (16237, 1293387), (22691, 925509), (23731, 884949), (48711, 431129), (68073, 308503), (71193, 294983)]