131811988

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{809}}^1$

素因数の和:877

約数の個数: 72

約数和(自身を含む): 301008960

約数和(自身を除く): 169196972

約数列:

[1, 2, 4, 7, 11, 14, 22, 23, 28, 44, 46, 77, 92, 154, 161, 253, 308, 322, 506, 529, 644, 809, 1012, 1058, 1618, 1771, 2116, 3236, 3542, 3703, 5663, 5819, 7084, 7406, 8899, 11326, 11638, 14812, 17798, 18607, 22652, 23276, 35596, 37214, 40733, 62293, 74428, 81466, 124586, 130249, 162932, 204677, 249172, 260498, 409354, 427961, 520996, 818708, 855922, 1432739, 1711844, 2865478, 2995727, 4707571, 5730956, 5991454, 9415142, 11982908, 18830284, 32952997, 65905994, 131811988]

約数ペア:

[(1, 131811988), (2, 65905994), (4, 32952997), (7, 18830284), (11, 11982908), (14, 9415142), (22, 5991454), (23, 5730956), (28, 4707571), (44, 2995727), (46, 2865478), (77, 1711844), (92, 1432739), (154, 855922), (161, 818708), (253, 520996), (308, 427961), (322, 409354), (506, 260498), (529, 249172), (644, 204677), (809, 162932), (1012, 130249), (1058, 124586), (1618, 81466), (1771, 74428), (2116, 62293), (3236, 40733), (3542, 37214), (3703, 35596), (5663, 23276), (5819, 22652), (7084, 18607), (7406, 17798), (8899, 14812), (11326, 11638)]