21313648

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{617}}^1$

素因数の和:769

約数の個数: 40

約数和(自身を含む): 44140032

約数和(自身を除く): 22826384

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 127, 136, 254, 272, 508, 617, 1016, 1234, 2032, 2159, 2468, 4318, 4936, 8636, 9872, 10489, 17272, 20978, 34544, 41956, 78359, 83912, 156718, 167824, 313436, 626872, 1253744, 1332103, 2664206, 5328412, 10656824, 21313648]

約数ペア:

[(1, 21313648), (2, 10656824), (4, 5328412), (8, 2664206), (16, 1332103), (17, 1253744), (34, 626872), (68, 313436), (127, 167824), (136, 156718), (254, 83912), (272, 78359), (508, 41956), (617, 34544), (1016, 20978), (1234, 17272), (2032, 10489), (2159, 9872), (2468, 8636), (4318, 4936)]