19990680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{7243}}^1$

素因数の和:7280

約数の個数: 64

約数和(自身を含む): 62588160

約数和(自身を除く): 42597480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 40, 46, 60, 69, 92, 115, 120, 138, 184, 230, 276, 345, 460, 552, 690, 920, 1380, 2760, 7243, 14486, 21729, 28972, 36215, 43458, 57944, 72430, 86916, 108645, 144860, 166589, 173832, 217290, 289720, 333178, 434580, 499767, 666356, 832945, 869160, 999534, 1332712, 1665890, 1999068, 2498835, 3331780, 3998136, 4997670, 6663560, 9995340, 19990680]

約数ペア:

[(1, 19990680), (2, 9995340), (3, 6663560), (4, 4997670), (5, 3998136), (6, 3331780), (8, 2498835), (10, 1999068), (12, 1665890), (15, 1332712), (20, 999534), (23, 869160), (24, 832945), (30, 666356), (40, 499767), (46, 434580), (60, 333178), (69, 289720), (92, 217290), (115, 173832), (120, 166589), (138, 144860), (184, 108645), (230, 86916), (276, 72430), (345, 57944), (460, 43458), (552, 36215), (690, 28972), (920, 21729), (1380, 14486), (2760, 7243)]