20380640

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{587}}^1$

素因数の和:640

約数の個数: 96

約数和(自身を含む): 56899584

約数和(自身を除く): 36518944

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 160, 217, 224, 248, 280, 310, 434, 496, 560, 587, 620, 868, 992, 1085, 1120, 1174, 1240, 1736, 2170, 2348, 2480, 2935, 3472, 4109, 4340, 4696, 4960, 5870, 6944, 8218, 8680, 9392, 11740, 16436, 17360, 18197, 18784, 20545, 23480, 32872, 34720, 36394, 41090, 46960, 65744, 72788, 82180, 90985, 93920, 127379, 131488, 145576, 164360, 181970, 254758, 291152, 328720, 363940, 509516, 582304, 636895, 657440, 727880, 1019032, 1273790, 1455760, 2038064, 2547580, 2911520, 4076128, 5095160, 10190320, 20380640]

約数ペア:

[(1, 20380640), (2, 10190320), (4, 5095160), (5, 4076128), (7, 2911520), (8, 2547580), (10, 2038064), (14, 1455760), (16, 1273790), (20, 1019032), (28, 727880), (31, 657440), (32, 636895), (35, 582304), (40, 509516), (56, 363940), (62, 328720), (70, 291152), (80, 254758), (112, 181970), (124, 164360), (140, 145576), (155, 131488), (160, 127379), (217, 93920), (224, 90985), (248, 82180), (280, 72788), (310, 65744), (434, 46960), (496, 41090), (560, 36394), (587, 34720), (620, 32872), (868, 23480), (992, 20545), (1085, 18784), (1120, 18197), (1174, 17360), (1240, 16436), (1736, 11740), (2170, 9392), (2348, 8680), (2480, 8218), (2935, 6944), (3472, 5870), (4109, 4960), (4340, 4696)]