21712880

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{191}}^1$

素因数の和:247

約数の個数: 120

約数和(自身を含む): 61067520

約数和(自身を除く): 39354640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 35, 40, 49, 56, 58, 70, 80, 98, 112, 116, 140, 145, 191, 196, 203, 232, 245, 280, 290, 382, 392, 406, 464, 490, 560, 580, 764, 784, 812, 955, 980, 1015, 1160, 1337, 1421, 1528, 1624, 1910, 1960, 2030, 2320, 2674, 2842, 3056, 3248, 3820, 3920, 4060, 5348, 5539, 5684, 6685, 7105, 7640, 8120, 9359, 10696, 11078, 11368, 13370, 14210, 15280, 16240, 18718, 21392, 22156, 22736, 26740, 27695, 28420, 37436, 38773, 44312, 46795, 53480, 55390, 56840, 74872, 77546, 88624, 93590, 106960, 110780, 113680, 149744, 155092, 187180, 193865, 221560, 271411, 310184, 374360, 387730, 443120, 542822, 620368, 748720, 775460, 1085644, 1357055, 1550920, 2171288, 2714110, 3101840, 4342576, 5428220, 10856440, 21712880]

約数ペア:

[(1, 21712880), (2, 10856440), (4, 5428220), (5, 4342576), (7, 3101840), (8, 2714110), (10, 2171288), (14, 1550920), (16, 1357055), (20, 1085644), (28, 775460), (29, 748720), (35, 620368), (40, 542822), (49, 443120), (56, 387730), (58, 374360), (70, 310184), (80, 271411), (98, 221560), (112, 193865), (116, 187180), (140, 155092), (145, 149744), (191, 113680), (196, 110780), (203, 106960), (232, 93590), (245, 88624), (280, 77546), (290, 74872), (382, 56840), (392, 55390), (406, 53480), (464, 46795), (490, 44312), (560, 38773), (580, 37436), (764, 28420), (784, 27695), (812, 26740), (955, 22736), (980, 22156), (1015, 21392), (1160, 18718), (1337, 16240), (1421, 15280), (1528, 14210), (1624, 13370), (1910, 11368), (1960, 11078), (2030, 10696), (2320, 9359), (2674, 8120), (2842, 7640), (3056, 7105), (3248, 6685), (3820, 5684), (3920, 5539), (4060, 5348)]