20381580

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{569}}^1$

素因数の和:783

約数の個数: 72

約数和(自身を含む): 62244000

約数和(自身を除く): 41862420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 199, 398, 569, 597, 796, 995, 1138, 1194, 1707, 1791, 1990, 2276, 2388, 2845, 2985, 3414, 3582, 3980, 5121, 5690, 5970, 6828, 7164, 8535, 8955, 10242, 11380, 11940, 17070, 17910, 20484, 25605, 34140, 35820, 51210, 102420, 113231, 226462, 339693, 452924, 566155, 679386, 1019079, 1132310, 1358772, 1698465, 2038158, 2264620, 3396930, 4076316, 5095395, 6793860, 10190790, 20381580]

約数ペア:

[(1, 20381580), (2, 10190790), (3, 6793860), (4, 5095395), (5, 4076316), (6, 3396930), (9, 2264620), (10, 2038158), (12, 1698465), (15, 1358772), (18, 1132310), (20, 1019079), (30, 679386), (36, 566155), (45, 452924), (60, 339693), (90, 226462), (180, 113231), (199, 102420), (398, 51210), (569, 35820), (597, 34140), (796, 25605), (995, 20484), (1138, 17910), (1194, 17070), (1707, 11940), (1791, 11380), (1990, 10242), (2276, 8955), (2388, 8535), (2845, 7164), (2985, 6828), (3414, 5970), (3582, 5690), (3980, 5121)]