20977980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{173}}^1$

素因数の和:275

約数の個数: 96

約数和(自身を含む): 61737984

約数和(自身を除く): 40760004

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 47, 60, 86, 94, 129, 141, 172, 173, 188, 215, 235, 258, 282, 346, 430, 470, 516, 519, 564, 645, 692, 705, 860, 865, 940, 1038, 1290, 1410, 1730, 2021, 2076, 2580, 2595, 2820, 3460, 4042, 5190, 6063, 7439, 8084, 8131, 10105, 10380, 12126, 14878, 16262, 20210, 22317, 24252, 24393, 29756, 30315, 32524, 37195, 40420, 40655, 44634, 48786, 60630, 74390, 81310, 89268, 97572, 111585, 121260, 121965, 148780, 162620, 223170, 243930, 349633, 446340, 487860, 699266, 1048899, 1398532, 1748165, 2097798, 3496330, 4195596, 5244495, 6992660, 10488990, 20977980]

約数ペア:

[(1, 20977980), (2, 10488990), (3, 6992660), (4, 5244495), (5, 4195596), (6, 3496330), (10, 2097798), (12, 1748165), (15, 1398532), (20, 1048899), (30, 699266), (43, 487860), (47, 446340), (60, 349633), (86, 243930), (94, 223170), (129, 162620), (141, 148780), (172, 121965), (173, 121260), (188, 111585), (215, 97572), (235, 89268), (258, 81310), (282, 74390), (346, 60630), (430, 48786), (470, 44634), (516, 40655), (519, 40420), (564, 37195), (645, 32524), (692, 30315), (705, 29756), (860, 24393), (865, 24252), (940, 22317), (1038, 20210), (1290, 16262), (1410, 14878), (1730, 12126), (2021, 10380), (2076, 10105), (2580, 8131), (2595, 8084), (2820, 7439), (3460, 6063), (4042, 5190)]