21063159

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{241}}^1$

素因数の和:349

約数の個数: 40

約数和(自身を含む): 34435632

約数和(自身を除く): 13372473

約数列:

[1, 3, 9, 13, 27, 39, 81, 83, 117, 241, 249, 351, 723, 747, 1053, 1079, 2169, 2241, 3133, 3237, 6507, 6723, 9399, 9711, 19521, 20003, 28197, 29133, 60009, 84591, 87399, 180027, 253773, 260039, 540081, 780117, 1620243, 2340351, 7021053, 21063159]

約数ペア:

[(1, 21063159), (3, 7021053), (9, 2340351), (13, 1620243), (27, 780117), (39, 540081), (81, 260039), (83, 253773), (117, 180027), (241, 87399), (249, 84591), (351, 60009), (723, 29133), (747, 28197), (1053, 20003), (1079, 19521), (2169, 9711), (2241, 9399), (3133, 6723), (3237, 6507)]