20421618

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{163}}^1$

素因数の和:351

約数の個数: 64

約数和(自身を含む): 49751040

約数和(自身を除く): 29329422

約数列:

[1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 157, 163, 266, 314, 326, 399, 471, 489, 798, 942, 978, 1099, 1141, 2198, 2282, 2983, 3097, 3297, 3423, 5966, 6194, 6594, 6846, 8949, 9291, 17898, 18582, 20881, 21679, 25591, 41762, 43358, 51182, 62643, 65037, 76773, 125286, 130074, 153546, 179137, 358274, 486229, 537411, 972458, 1074822, 1458687, 2917374, 3403603, 6807206, 10210809, 20421618]

約数ペア:

[(1, 20421618), (2, 10210809), (3, 6807206), (6, 3403603), (7, 2917374), (14, 1458687), (19, 1074822), (21, 972458), (38, 537411), (42, 486229), (57, 358274), (114, 179137), (133, 153546), (157, 130074), (163, 125286), (266, 76773), (314, 65037), (326, 62643), (399, 51182), (471, 43358), (489, 41762), (798, 25591), (942, 21679), (978, 20881), (1099, 18582), (1141, 17898), (2198, 9291), (2282, 8949), (2983, 6846), (3097, 6594), (3297, 6194), (3423, 5966)]