640484012

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{2749}}^1$

素因数の和:2970

約数の個数: 48

約数和(自身を含む): 1313928000

約数和(自身を除く): 673443988

約数列:

[1, 2, 4, 7, 14, 28, 53, 106, 157, 212, 314, 371, 628, 742, 1099, 1484, 2198, 2749, 4396, 5498, 8321, 10996, 16642, 19243, 33284, 38486, 58247, 76972, 116494, 145697, 232988, 291394, 431593, 582788, 863186, 1019879, 1726372, 2039758, 3021151, 4079516, 6042302, 12084604, 22874429, 45748858, 91497716, 160121003, 320242006, 640484012]

約数ペア:

[(1, 640484012), (2, 320242006), (4, 160121003), (7, 91497716), (14, 45748858), (28, 22874429), (53, 12084604), (106, 6042302), (157, 4079516), (212, 3021151), (314, 2039758), (371, 1726372), (628, 1019879), (742, 863186), (1099, 582788), (1484, 431593), (2198, 291394), (2749, 232988), (4396, 145697), (5498, 116494), (8321, 76972), (10996, 58247), (16642, 38486), (19243, 33284)]