81115720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{1069}}^1$

素因数の和:1358

約数の個数: 64

約数和(自身を含む): 209548800

約数和(自身を除く): 128433080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 271, 280, 542, 1069, 1084, 1355, 1897, 2138, 2168, 2710, 3794, 4276, 5345, 5420, 7483, 7588, 8552, 9485, 10690, 10840, 14966, 15176, 18970, 21380, 29932, 37415, 37940, 42760, 59864, 74830, 75880, 149660, 289699, 299320, 579398, 1158796, 1448495, 2027893, 2317592, 2896990, 4055786, 5793980, 8111572, 10139465, 11587960, 16223144, 20278930, 40557860, 81115720]

約数ペア:

[(1, 81115720), (2, 40557860), (4, 20278930), (5, 16223144), (7, 11587960), (8, 10139465), (10, 8111572), (14, 5793980), (20, 4055786), (28, 2896990), (35, 2317592), (40, 2027893), (56, 1448495), (70, 1158796), (140, 579398), (271, 299320), (280, 289699), (542, 149660), (1069, 75880), (1084, 74830), (1355, 59864), (1897, 42760), (2138, 37940), (2168, 37415), (2710, 29932), (3794, 21380), (4276, 18970), (5345, 15176), (5420, 14966), (7483, 10840), (7588, 10690), (8552, 9485)]