20411720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{269}}^1\times {\mathrm{271}}^1$

素因数の和:558

約数の個数: 64

約数和(自身を含む): 52876800

約数和(自身を除く): 32465080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 269, 271, 280, 538, 542, 1076, 1084, 1345, 1355, 1883, 1897, 2152, 2168, 2690, 2710, 3766, 3794, 5380, 5420, 7532, 7588, 9415, 9485, 10760, 10840, 15064, 15176, 18830, 18970, 37660, 37940, 72899, 75320, 75880, 145798, 291596, 364495, 510293, 583192, 728990, 1020586, 1457980, 2041172, 2551465, 2915960, 4082344, 5102930, 10205860, 20411720]

約数ペア:

[(1, 20411720), (2, 10205860), (4, 5102930), (5, 4082344), (7, 2915960), (8, 2551465), (10, 2041172), (14, 1457980), (20, 1020586), (28, 728990), (35, 583192), (40, 510293), (56, 364495), (70, 291596), (140, 145798), (269, 75880), (271, 75320), (280, 72899), (538, 37940), (542, 37660), (1076, 18970), (1084, 18830), (1345, 15176), (1355, 15064), (1883, 10840), (1897, 10760), (2152, 9485), (2168, 9415), (2690, 7588), (2710, 7532), (3766, 5420), (3794, 5380)]