161210980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{179}}^1\times {\mathrm{919}}^1$

素因数の和:1121

約数の個数: 72

約数和(自身を含む): 396446400

約数和(自身を除く): 235235420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 179, 196, 245, 358, 490, 716, 895, 919, 980, 1253, 1790, 1838, 2506, 3580, 3676, 4595, 5012, 6265, 6433, 8771, 9190, 12530, 12866, 17542, 18380, 25060, 25732, 32165, 35084, 43855, 45031, 64330, 87710, 90062, 128660, 164501, 175420, 180124, 225155, 329002, 450310, 658004, 822505, 900620, 1151507, 1645010, 2303014, 3290020, 4606028, 5757535, 8060549, 11515070, 16121098, 23030140, 32242196, 40302745, 80605490, 161210980]

約数ペア:

[(1, 161210980), (2, 80605490), (4, 40302745), (5, 32242196), (7, 23030140), (10, 16121098), (14, 11515070), (20, 8060549), (28, 5757535), (35, 4606028), (49, 3290020), (70, 2303014), (98, 1645010), (140, 1151507), (179, 900620), (196, 822505), (245, 658004), (358, 450310), (490, 329002), (716, 225155), (895, 180124), (919, 175420), (980, 164501), (1253, 128660), (1790, 90062), (1838, 87710), (2506, 64330), (3580, 45031), (3676, 43855), (4595, 35084), (5012, 32165), (6265, 25732), (6433, 25060), (8771, 18380), (9190, 17542), (12530, 12866)]