21901880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{547}}^1$

素因数の和:589

約数の個数: 128

約数和(自身を含む): 66286080

約数和(自身を除く): 44384200

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 20, 22, 26, 28, 35, 40, 44, 52, 55, 56, 65, 70, 77, 88, 91, 104, 110, 130, 140, 143, 154, 182, 220, 260, 280, 286, 308, 364, 385, 440, 455, 520, 547, 572, 616, 715, 728, 770, 910, 1001, 1094, 1144, 1430, 1540, 1820, 2002, 2188, 2735, 2860, 3080, 3640, 3829, 4004, 4376, 5005, 5470, 5720, 6017, 7111, 7658, 8008, 10010, 10940, 12034, 14222, 15316, 19145, 20020, 21880, 24068, 28444, 30085, 30632, 35555, 38290, 40040, 42119, 48136, 49777, 56888, 60170, 71110, 76580, 78221, 84238, 99554, 120340, 142220, 153160, 156442, 168476, 199108, 210595, 240680, 248885, 284440, 312884, 336952, 391105, 398216, 421190, 497770, 547547, 625768, 782210, 842380, 995540, 1095094, 1564420, 1684760, 1991080, 2190188, 2737735, 3128840, 4380376, 5475470, 10950940, 21901880]

約数ペア:

[(1, 21901880), (2, 10950940), (4, 5475470), (5, 4380376), (7, 3128840), (8, 2737735), (10, 2190188), (11, 1991080), (13, 1684760), (14, 1564420), (20, 1095094), (22, 995540), (26, 842380), (28, 782210), (35, 625768), (40, 547547), (44, 497770), (52, 421190), (55, 398216), (56, 391105), (65, 336952), (70, 312884), (77, 284440), (88, 248885), (91, 240680), (104, 210595), (110, 199108), (130, 168476), (140, 156442), (143, 153160), (154, 142220), (182, 120340), (220, 99554), (260, 84238), (280, 78221), (286, 76580), (308, 71110), (364, 60170), (385, 56888), (440, 49777), (455, 48136), (520, 42119), (547, 40040), (572, 38290), (616, 35555), (715, 30632), (728, 30085), (770, 28444), (910, 24068), (1001, 21880), (1094, 20020), (1144, 19145), (1430, 15316), (1540, 14222), (1820, 12034), (2002, 10940), (2188, 10010), (2735, 8008), (2860, 7658), (3080, 7111), (3640, 6017), (3829, 5720), (4004, 5470), (4376, 5005)]