21000070

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{491}}^1$

素因数の和:565

約数の個数: 64

約数和(自身を含む): 47609856

約数和(自身を除く): 26609786

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 47, 65, 70, 91, 94, 130, 182, 235, 329, 455, 470, 491, 611, 658, 910, 982, 1222, 1645, 2455, 3055, 3290, 3437, 4277, 4910, 6110, 6383, 6874, 8554, 12766, 17185, 21385, 23077, 31915, 34370, 42770, 44681, 46154, 63830, 89362, 115385, 161539, 223405, 230770, 300001, 323078, 446810, 600002, 807695, 1500005, 1615390, 2100007, 3000010, 4200014, 10500035, 21000070]

約数ペア:

[(1, 21000070), (2, 10500035), (5, 4200014), (7, 3000010), (10, 2100007), (13, 1615390), (14, 1500005), (26, 807695), (35, 600002), (47, 446810), (65, 323078), (70, 300001), (91, 230770), (94, 223405), (130, 161539), (182, 115385), (235, 89362), (329, 63830), (455, 46154), (470, 44681), (491, 42770), (611, 34370), (658, 31915), (910, 23077), (982, 21385), (1222, 17185), (1645, 12766), (2455, 8554), (3055, 6874), (3290, 6383), (3437, 6110), (4277, 4910)]