128647540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{251}}^1\times {\mathrm{523}}^1$

素因数の和:797

約数の個数: 72

約数和(自身を含む): 316122912

約数和(自身を除く): 187475372

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 251, 490, 502, 523, 980, 1004, 1046, 1255, 1757, 2092, 2510, 2615, 3514, 3661, 5020, 5230, 7028, 7322, 8785, 10460, 12299, 14644, 17570, 18305, 24598, 25627, 35140, 36610, 49196, 51254, 61495, 73220, 102508, 122990, 128135, 131273, 245980, 256270, 262546, 512540, 525092, 656365, 918911, 1312730, 1837822, 2625460, 3675644, 4594555, 6432377, 9189110, 12864754, 18378220, 25729508, 32161885, 64323770, 128647540]

約数ペア:

[(1, 128647540), (2, 64323770), (4, 32161885), (5, 25729508), (7, 18378220), (10, 12864754), (14, 9189110), (20, 6432377), (28, 4594555), (35, 3675644), (49, 2625460), (70, 1837822), (98, 1312730), (140, 918911), (196, 656365), (245, 525092), (251, 512540), (490, 262546), (502, 256270), (523, 245980), (980, 131273), (1004, 128135), (1046, 122990), (1255, 102508), (1757, 73220), (2092, 61495), (2510, 51254), (2615, 49196), (3514, 36610), (3661, 35140), (5020, 25627), (5230, 24598), (7028, 18305), (7322, 17570), (8785, 14644), (10460, 12299)]