21001080

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1$

素因数の和:245

約数の個数: 128

約数和(自身を含む): 67852800

約数和(自身を除く): 46851720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 57, 60, 61, 76, 95, 114, 120, 122, 151, 152, 183, 190, 228, 244, 285, 302, 305, 366, 380, 453, 456, 488, 570, 604, 610, 732, 755, 760, 906, 915, 1140, 1159, 1208, 1220, 1464, 1510, 1812, 1830, 2265, 2280, 2318, 2440, 2869, 3020, 3477, 3624, 3660, 4530, 4636, 5738, 5795, 6040, 6954, 7320, 8607, 9060, 9211, 9272, 11476, 11590, 13908, 14345, 17214, 17385, 18120, 18422, 22952, 23180, 27633, 27816, 28690, 34428, 34770, 36844, 43035, 46055, 46360, 55266, 57380, 68856, 69540, 73688, 86070, 92110, 110532, 114760, 138165, 139080, 172140, 175009, 184220, 221064, 276330, 344280, 350018, 368440, 525027, 552660, 700036, 875045, 1050054, 1105320, 1400072, 1750090, 2100108, 2625135, 3500180, 4200216, 5250270, 7000360, 10500540, 21001080]

約数ペア:

[(1, 21001080), (2, 10500540), (3, 7000360), (4, 5250270), (5, 4200216), (6, 3500180), (8, 2625135), (10, 2100108), (12, 1750090), (15, 1400072), (19, 1105320), (20, 1050054), (24, 875045), (30, 700036), (38, 552660), (40, 525027), (57, 368440), (60, 350018), (61, 344280), (76, 276330), (95, 221064), (114, 184220), (120, 175009), (122, 172140), (151, 139080), (152, 138165), (183, 114760), (190, 110532), (228, 92110), (244, 86070), (285, 73688), (302, 69540), (305, 68856), (366, 57380), (380, 55266), (453, 46360), (456, 46055), (488, 43035), (570, 36844), (604, 34770), (610, 34428), (732, 28690), (755, 27816), (760, 27633), (906, 23180), (915, 22952), (1140, 18422), (1159, 18120), (1208, 17385), (1220, 17214), (1464, 14345), (1510, 13908), (1812, 11590), (1830, 11476), (2265, 9272), (2280, 9211), (2318, 9060), (2440, 8607), (2869, 7320), (3020, 6954), (3477, 6040), (3624, 5795), (3660, 5738), (4530, 4636)]