19978854

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{349}}^1$

素因数の和:437

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 28405146

約数列:

[1, 2, 3, 6, 7, 14, 21, 29, 42, 47, 58, 87, 94, 141, 174, 203, 282, 329, 349, 406, 609, 658, 698, 987, 1047, 1218, 1363, 1974, 2094, 2443, 2726, 4089, 4886, 7329, 8178, 9541, 10121, 14658, 16403, 19082, 20242, 28623, 30363, 32806, 49209, 57246, 60726, 70847, 98418, 114821, 141694, 212541, 229642, 344463, 425082, 475687, 688926, 951374, 1427061, 2854122, 3329809, 6659618, 9989427, 19978854]

約数ペア:

[(1, 19978854), (2, 9989427), (3, 6659618), (6, 3329809), (7, 2854122), (14, 1427061), (21, 951374), (29, 688926), (42, 475687), (47, 425082), (58, 344463), (87, 229642), (94, 212541), (141, 141694), (174, 114821), (203, 98418), (282, 70847), (329, 60726), (349, 57246), (406, 49209), (609, 32806), (658, 30363), (698, 28623), (987, 20242), (1047, 19082), (1218, 16403), (1363, 14658), (1974, 10121), (2094, 9541), (2443, 8178), (2726, 7329), (4089, 4886)]