18378009

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{563}}^1$

素因数の和:619

約数の個数: 40

約数和(自身を含む): 30573312

約数和(自身を除く): 12195303

約数列:

[1, 3, 9, 13, 27, 31, 39, 81, 93, 117, 279, 351, 403, 563, 837, 1053, 1209, 1689, 2511, 3627, 5067, 7319, 10881, 15201, 17453, 21957, 32643, 45603, 52359, 65871, 157077, 197613, 226889, 471231, 592839, 680667, 1413693, 2042001, 6126003, 18378009]

約数ペア:

[(1, 18378009), (3, 6126003), (9, 2042001), (13, 1413693), (27, 680667), (31, 592839), (39, 471231), (81, 226889), (93, 197613), (117, 157077), (279, 65871), (351, 52359), (403, 45603), (563, 32643), (837, 21957), (1053, 17453), (1209, 15201), (1689, 10881), (2511, 7319), (3627, 5067)]