8281720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{641}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 20800800

約数和(自身を除く): 12519080

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 152, 170, 190, 323, 340, 380, 641, 646, 680, 760, 1282, 1292, 1615, 2564, 2584, 3205, 3230, 5128, 6410, 6460, 10897, 12179, 12820, 12920, 21794, 24358, 25640, 43588, 48716, 54485, 60895, 87176, 97432, 108970, 121790, 207043, 217940, 243580, 414086, 435880, 487160, 828172, 1035215, 1656344, 2070430, 4140860, 8281720]

約数ペア:

[(1, 8281720), (2, 4140860), (4, 2070430), (5, 1656344), (8, 1035215), (10, 828172), (17, 487160), (19, 435880), (20, 414086), (34, 243580), (38, 217940), (40, 207043), (68, 121790), (76, 108970), (85, 97432), (95, 87176), (136, 60895), (152, 54485), (170, 48716), (190, 43588), (323, 25640), (340, 24358), (380, 21794), (641, 12920), (646, 12820), (680, 12179), (760, 10897), (1282, 6460), (1292, 6410), (1615, 5128), (2564, 3230), (2584, 3205)]