20666240

素因数分解:

$2^7\times 5^1\times 7^2\times {\mathrm{659}}^1$

素因数の和:692

約数の個数: 96

約数和(自身を含む): 57558600

約数和(自身を除く): 36892360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 280, 320, 392, 448, 490, 560, 640, 659, 784, 896, 980, 1120, 1318, 1568, 1960, 2240, 2636, 3136, 3295, 3920, 4480, 4613, 5272, 6272, 6590, 7840, 9226, 10544, 13180, 15680, 18452, 21088, 23065, 26360, 31360, 32291, 36904, 42176, 46130, 52720, 64582, 73808, 84352, 92260, 105440, 129164, 147616, 161455, 184520, 210880, 258328, 295232, 322910, 369040, 421760, 516656, 590464, 645820, 738080, 1033312, 1291640, 1476160, 2066624, 2583280, 2952320, 4133248, 5166560, 10333120, 20666240]

約数ペア:

[(1, 20666240), (2, 10333120), (4, 5166560), (5, 4133248), (7, 2952320), (8, 2583280), (10, 2066624), (14, 1476160), (16, 1291640), (20, 1033312), (28, 738080), (32, 645820), (35, 590464), (40, 516656), (49, 421760), (56, 369040), (64, 322910), (70, 295232), (80, 258328), (98, 210880), (112, 184520), (128, 161455), (140, 147616), (160, 129164), (196, 105440), (224, 92260), (245, 84352), (280, 73808), (320, 64582), (392, 52720), (448, 46130), (490, 42176), (560, 36904), (640, 32291), (659, 31360), (784, 26360), (896, 23065), (980, 21088), (1120, 18452), (1318, 15680), (1568, 13180), (1960, 10544), (2240, 9226), (2636, 7840), (3136, 6590), (3295, 6272), (3920, 5272), (4480, 4613)]