890890

素因数分解:

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

素因数の和:127

約数の個数: 64

約数和(自身を含む): 2177280

約数和(自身を除く): 1286390

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 26, 35, 55, 65, 70, 77, 89, 91, 110, 130, 143, 154, 178, 182, 286, 385, 445, 455, 623, 715, 770, 890, 910, 979, 1001, 1157, 1246, 1430, 1958, 2002, 2314, 3115, 4895, 5005, 5785, 6230, 6853, 8099, 9790, 10010, 11570, 12727, 13706, 16198, 25454, 34265, 40495, 63635, 68530, 80990, 89089, 127270, 178178, 445445, 890890]

約数ペア:

[(1, 890890), (2, 445445), (5, 178178), (7, 127270), (10, 89089), (11, 80990), (13, 68530), (14, 63635), (22, 40495), (26, 34265), (35, 25454), (55, 16198), (65, 13706), (70, 12727), (77, 11570), (89, 10010), (91, 9790), (110, 8099), (130, 6853), (143, 6230), (154, 5785), (178, 5005), (182, 4895), (286, 3115), (385, 2314), (445, 2002), (455, 1958), (623, 1430), (715, 1246), (770, 1157), (890, 1001), (910, 979)]