20496543004

素因数分解:

$2^2\times 7^2\times {\mathrm{89}}^1\times {\mathrm{787}}^1\times {\mathrm{1493}}^1$

素因数の和:2387

約数の個数: 72

約数和(自身を含む): 42275837520

約数和(自身を除く): 21779294516

約数列:

[1, 2, 4, 7, 14, 28, 49, 89, 98, 178, 196, 356, 623, 787, 1246, 1493, 1574, 2492, 2986, 3148, 4361, 5509, 5972, 8722, 10451, 11018, 17444, 20902, 22036, 38563, 41804, 70043, 73157, 77126, 132877, 140086, 146314, 154252, 265754, 280172, 292628, 490301, 531508, 930139, 980602, 1174991, 1860278, 1961204, 2349982, 3432107, 3720556, 4699964, 6510973, 6864214, 8224937, 13021946, 13728428, 16449874, 26043892, 32899748, 57574559, 104574199, 115149118, 209148398, 230298236, 418296796, 732019393, 1464038786, 2928077572, 5124135751, 10248271502, 20496543004]

約数ペア:

[(1, 20496543004), (2, 10248271502), (4, 5124135751), (7, 2928077572), (14, 1464038786), (28, 732019393), (49, 418296796), (89, 230298236), (98, 209148398), (178, 115149118), (196, 104574199), (356, 57574559), (623, 32899748), (787, 26043892), (1246, 16449874), (1493, 13728428), (1574, 13021946), (2492, 8224937), (2986, 6864214), (3148, 6510973), (4361, 4699964), (5509, 3720556), (5972, 3432107), (8722, 2349982), (10451, 1961204), (11018, 1860278), (17444, 1174991), (20902, 980602), (22036, 930139), (38563, 531508), (41804, 490301), (70043, 292628), (73157, 280172), (77126, 265754), (132877, 154252), (140086, 146314)]