81777280

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9829}}^1$

素因数の和:9861

約数の個数: 64

約数和(自身を含む): 210558600

約数和(自身を除く): 128781320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 4160, 8320, 9829, 19658, 39316, 49145, 78632, 98290, 127777, 157264, 196580, 255554, 314528, 393160, 511108, 629056, 638885, 786320, 1022216, 1258112, 1277770, 1572640, 2044432, 2555540, 3145280, 4088864, 5111080, 6290560, 8177728, 10222160, 16355456, 20444320, 40888640, 81777280]

約数ペア:

[(1, 81777280), (2, 40888640), (4, 20444320), (5, 16355456), (8, 10222160), (10, 8177728), (13, 6290560), (16, 5111080), (20, 4088864), (26, 3145280), (32, 2555540), (40, 2044432), (52, 1572640), (64, 1277770), (65, 1258112), (80, 1022216), (104, 786320), (128, 638885), (130, 629056), (160, 511108), (208, 393160), (260, 314528), (320, 255554), (416, 196580), (520, 157264), (640, 127777), (832, 98290), (1040, 78632), (1664, 49145), (2080, 39316), (4160, 19658), (8320, 9829)]