20974940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1259}}^1$

素因数の和:1299

約数の個数: 72

約数和(自身を含む): 54295920

約数和(自身を除く): 33320980

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 49, 68, 70, 85, 98, 119, 140, 170, 196, 238, 245, 340, 476, 490, 595, 833, 980, 1190, 1259, 1666, 2380, 2518, 3332, 4165, 5036, 6295, 8330, 8813, 12590, 16660, 17626, 21403, 25180, 35252, 42806, 44065, 61691, 85612, 88130, 107015, 123382, 149821, 176260, 214030, 246764, 299642, 308455, 428060, 599284, 616910, 749105, 1048747, 1233820, 1498210, 2097494, 2996420, 4194988, 5243735, 10487470, 20974940]

約数ペア:

[(1, 20974940), (2, 10487470), (4, 5243735), (5, 4194988), (7, 2996420), (10, 2097494), (14, 1498210), (17, 1233820), (20, 1048747), (28, 749105), (34, 616910), (35, 599284), (49, 428060), (68, 308455), (70, 299642), (85, 246764), (98, 214030), (119, 176260), (140, 149821), (170, 123382), (196, 107015), (238, 88130), (245, 85612), (340, 61691), (476, 44065), (490, 42806), (595, 35252), (833, 25180), (980, 21403), (1190, 17626), (1259, 16660), (1666, 12590), (2380, 8813), (2518, 8330), (3332, 6295), (4165, 5036)]