21374847

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{383}}^1$

素因数の和:461

約数の個数: 40

約数和(自身を含む): 35126784

約数和(自身を除く): 13751937

約数列:

[1, 3, 9, 13, 27, 39, 53, 81, 117, 159, 351, 383, 477, 689, 1053, 1149, 1431, 2067, 3447, 4293, 4979, 6201, 10341, 14937, 18603, 20299, 31023, 44811, 55809, 60897, 134433, 182691, 263887, 403299, 548073, 791661, 1644219, 2374983, 7124949, 21374847]

約数ペア:

[(1, 21374847), (3, 7124949), (9, 2374983), (13, 1644219), (27, 791661), (39, 548073), (53, 403299), (81, 263887), (117, 182691), (159, 134433), (351, 60897), (383, 55809), (477, 44811), (689, 31023), (1053, 20299), (1149, 18603), (1431, 14937), (2067, 10341), (3447, 6201), (4293, 4979)]