8999900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:100

約数の個数: 144

約数和(自身を含む): 25665024

約数和(自身を除く): 16665124

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 23, 25, 26, 28, 35, 43, 46, 50, 52, 65, 70, 86, 91, 92, 100, 115, 130, 140, 161, 172, 175, 182, 215, 230, 260, 299, 301, 322, 325, 350, 364, 430, 455, 460, 559, 575, 598, 602, 644, 650, 700, 805, 860, 910, 989, 1075, 1118, 1150, 1196, 1204, 1300, 1495, 1505, 1610, 1820, 1978, 2093, 2150, 2236, 2275, 2300, 2795, 2990, 3010, 3220, 3913, 3956, 4025, 4186, 4300, 4550, 4945, 5590, 5980, 6020, 6923, 7475, 7525, 7826, 8050, 8372, 9100, 9890, 10465, 11180, 12857, 13846, 13975, 14950, 15050, 15652, 16100, 19565, 19780, 20930, 24725, 25714, 27692, 27950, 29900, 30100, 34615, 39130, 41860, 49450, 51428, 52325, 55900, 64285, 69230, 78260, 89999, 97825, 98900, 104650, 128570, 138460, 173075, 179998, 195650, 209300, 257140, 321425, 346150, 359996, 391300, 449995, 642850, 692300, 899990, 1285700, 1799980, 2249975, 4499950, 8999900]

約数ペア:

[(1, 8999900), (2, 4499950), (4, 2249975), (5, 1799980), (7, 1285700), (10, 899990), (13, 692300), (14, 642850), (20, 449995), (23, 391300), (25, 359996), (26, 346150), (28, 321425), (35, 257140), (43, 209300), (46, 195650), (50, 179998), (52, 173075), (65, 138460), (70, 128570), (86, 104650), (91, 98900), (92, 97825), (100, 89999), (115, 78260), (130, 69230), (140, 64285), (161, 55900), (172, 52325), (175, 51428), (182, 49450), (215, 41860), (230, 39130), (260, 34615), (299, 30100), (301, 29900), (322, 27950), (325, 27692), (350, 25714), (364, 24725), (430, 20930), (455, 19780), (460, 19565), (559, 16100), (575, 15652), (598, 15050), (602, 14950), (644, 13975), (650, 13846), (700, 12857), (805, 11180), (860, 10465), (910, 9890), (989, 9100), (1075, 8372), (1118, 8050), (1150, 7826), (1196, 7525), (1204, 7475), (1300, 6923), (1495, 6020), (1505, 5980), (1610, 5590), (1820, 4945), (1978, 4550), (2093, 4300), (2150, 4186), (2236, 4025), (2275, 3956), (2300, 3913), (2795, 3220), (2990, 3010)]