21651960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{349}}^1$

素因数の和:421

約数の個数: 128

約数和(自身を含む): 72576000

約数和(自身を除く): 50924040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 47, 55, 60, 66, 88, 94, 110, 120, 132, 141, 165, 188, 220, 235, 264, 282, 330, 349, 376, 440, 470, 517, 564, 660, 698, 705, 940, 1034, 1047, 1128, 1320, 1396, 1410, 1551, 1745, 1880, 2068, 2094, 2585, 2792, 2820, 3102, 3490, 3839, 4136, 4188, 5170, 5235, 5640, 6204, 6980, 7678, 7755, 8376, 10340, 10470, 11517, 12408, 13960, 15356, 15510, 16403, 19195, 20680, 20940, 23034, 30712, 31020, 32806, 38390, 41880, 46068, 49209, 57585, 62040, 65612, 76780, 82015, 92136, 98418, 115170, 131224, 153560, 164030, 180433, 196836, 230340, 246045, 328060, 360866, 393672, 460680, 492090, 541299, 656120, 721732, 902165, 984180, 1082598, 1443464, 1804330, 1968360, 2165196, 2706495, 3608660, 4330392, 5412990, 7217320, 10825980, 21651960]

約数ペア:

[(1, 21651960), (2, 10825980), (3, 7217320), (4, 5412990), (5, 4330392), (6, 3608660), (8, 2706495), (10, 2165196), (11, 1968360), (12, 1804330), (15, 1443464), (20, 1082598), (22, 984180), (24, 902165), (30, 721732), (33, 656120), (40, 541299), (44, 492090), (47, 460680), (55, 393672), (60, 360866), (66, 328060), (88, 246045), (94, 230340), (110, 196836), (120, 180433), (132, 164030), (141, 153560), (165, 131224), (188, 115170), (220, 98418), (235, 92136), (264, 82015), (282, 76780), (330, 65612), (349, 62040), (376, 57585), (440, 49209), (470, 46068), (517, 41880), (564, 38390), (660, 32806), (698, 31020), (705, 30712), (940, 23034), (1034, 20940), (1047, 20680), (1128, 19195), (1320, 16403), (1396, 15510), (1410, 15356), (1551, 13960), (1745, 12408), (1880, 11517), (2068, 10470), (2094, 10340), (2585, 8376), (2792, 7755), (2820, 7678), (3102, 6980), (3490, 6204), (3839, 5640), (4136, 5235), (4188, 5170)]