20547728

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{569}}^1$

素因数の和:675

約数の個数: 40

約数和(自身を含む): 41630520

約数和(自身を除く): 21082792

約数列:

[1, 2, 4, 8, 16, 37, 61, 74, 122, 148, 244, 296, 488, 569, 592, 976, 1138, 2257, 2276, 4514, 4552, 9028, 9104, 18056, 21053, 34709, 36112, 42106, 69418, 84212, 138836, 168424, 277672, 336848, 555344, 1284233, 2568466, 5136932, 10273864, 20547728]

約数ペア:

[(1, 20547728), (2, 10273864), (4, 5136932), (8, 2568466), (16, 1284233), (37, 555344), (61, 336848), (74, 277672), (122, 168424), (148, 138836), (244, 84212), (296, 69418), (488, 42106), (569, 36112), (592, 34709), (976, 21053), (1138, 18056), (2257, 9104), (2276, 9028), (4514, 4552)]