78876280

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{5749}}^1$

素因数の和:5781

約数の個数: 64

約数和(自身を含む): 207000000

約数和(自身を除く): 128123720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1715, 1960, 2744, 3430, 5749, 6860, 11498, 13720, 22996, 28745, 40243, 45992, 57490, 80486, 114980, 160972, 201215, 229960, 281701, 321944, 402430, 563402, 804860, 1126804, 1408505, 1609720, 1971907, 2253608, 2817010, 3943814, 5634020, 7887628, 9859535, 11268040, 15775256, 19719070, 39438140, 78876280]

約数ペア:

[(1, 78876280), (2, 39438140), (4, 19719070), (5, 15775256), (7, 11268040), (8, 9859535), (10, 7887628), (14, 5634020), (20, 3943814), (28, 2817010), (35, 2253608), (40, 1971907), (49, 1609720), (56, 1408505), (70, 1126804), (98, 804860), (140, 563402), (196, 402430), (245, 321944), (280, 281701), (343, 229960), (392, 201215), (490, 160972), (686, 114980), (980, 80486), (1372, 57490), (1715, 45992), (1960, 40243), (2744, 28745), (3430, 22996), (5749, 13720), (6860, 11498)]