1781780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1$

素因数の和:129

約数の個数: 96

約数和(自身を含む): 5080320

約数和(自身を除く): 3298540

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 89, 91, 110, 130, 140, 143, 154, 178, 182, 220, 260, 286, 308, 356, 364, 385, 445, 455, 572, 623, 715, 770, 890, 910, 979, 1001, 1157, 1246, 1430, 1540, 1780, 1820, 1958, 2002, 2314, 2492, 2860, 3115, 3916, 4004, 4628, 4895, 5005, 5785, 6230, 6853, 8099, 9790, 10010, 11570, 12460, 12727, 13706, 16198, 19580, 20020, 23140, 25454, 27412, 32396, 34265, 40495, 50908, 63635, 68530, 80990, 89089, 127270, 137060, 161980, 178178, 254540, 356356, 445445, 890890, 1781780]

約数ペア:

[(1, 1781780), (2, 890890), (4, 445445), (5, 356356), (7, 254540), (10, 178178), (11, 161980), (13, 137060), (14, 127270), (20, 89089), (22, 80990), (26, 68530), (28, 63635), (35, 50908), (44, 40495), (52, 34265), (55, 32396), (65, 27412), (70, 25454), (77, 23140), (89, 20020), (91, 19580), (110, 16198), (130, 13706), (140, 12727), (143, 12460), (154, 11570), (178, 10010), (182, 9790), (220, 8099), (260, 6853), (286, 6230), (308, 5785), (356, 5005), (364, 4895), (385, 4628), (445, 4004), (455, 3916), (572, 3115), (623, 2860), (715, 2492), (770, 2314), (890, 2002), (910, 1958), (979, 1820), (1001, 1780), (1157, 1540), (1246, 1430)]