19965540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{6791}}^1$

素因数の和:6817

約数の個数: 72

約数和(自身を含む): 65040192

約数和(自身を除く): 45074652

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 6791, 13582, 20373, 27164, 33955, 40746, 47537, 67910, 81492, 95074, 101865, 135820, 142611, 190148, 203730, 237685, 285222, 332759, 407460, 475370, 570444, 665518, 713055, 950740, 998277, 1331036, 1426110, 1663795, 1996554, 2852220, 3327590, 3993108, 4991385, 6655180, 9982770, 19965540]

約数ペア:

[(1, 19965540), (2, 9982770), (3, 6655180), (4, 4991385), (5, 3993108), (6, 3327590), (7, 2852220), (10, 1996554), (12, 1663795), (14, 1426110), (15, 1331036), (20, 998277), (21, 950740), (28, 713055), (30, 665518), (35, 570444), (42, 475370), (49, 407460), (60, 332759), (70, 285222), (84, 237685), (98, 203730), (105, 190148), (140, 142611), (147, 135820), (196, 101865), (210, 95074), (245, 81492), (294, 67910), (420, 47537), (490, 40746), (588, 33955), (735, 27164), (980, 20373), (1470, 13582), (2940, 6791)]