21870520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4111}}^1$

素因数の和:4148

約数の個数: 64

約数和(自身を含む): 59212800

約数和(自身を除く): 37342280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 4111, 5320, 8222, 16444, 20555, 28777, 32888, 41110, 57554, 78109, 82220, 115108, 143885, 156218, 164440, 230216, 287770, 312436, 390545, 546763, 575540, 624872, 781090, 1093526, 1151080, 1562180, 2187052, 2733815, 3124360, 4374104, 5467630, 10935260, 21870520]

約数ペア:

[(1, 21870520), (2, 10935260), (4, 5467630), (5, 4374104), (7, 3124360), (8, 2733815), (10, 2187052), (14, 1562180), (19, 1151080), (20, 1093526), (28, 781090), (35, 624872), (38, 575540), (40, 546763), (56, 390545), (70, 312436), (76, 287770), (95, 230216), (133, 164440), (140, 156218), (152, 143885), (190, 115108), (266, 82220), (280, 78109), (380, 57554), (532, 41110), (665, 32888), (760, 28777), (1064, 20555), (1330, 16444), (2660, 8222), (4111, 5320)]