20565296

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{1109}}^1$

素因数の和:1197

約数の個数: 40

約数和(自身を含む): 42668400

約数和(自身を除く): 22103104

約数列:

[1, 2, 4, 8, 16, 19, 38, 61, 76, 122, 152, 244, 304, 488, 976, 1109, 1159, 2218, 2318, 4436, 4636, 8872, 9272, 17744, 18544, 21071, 42142, 67649, 84284, 135298, 168568, 270596, 337136, 541192, 1082384, 1285331, 2570662, 5141324, 10282648, 20565296]

約数ペア:

[(1, 20565296), (2, 10282648), (4, 5141324), (8, 2570662), (16, 1285331), (19, 1082384), (38, 541192), (61, 337136), (76, 270596), (122, 168568), (152, 135298), (244, 84284), (304, 67649), (488, 42142), (976, 21071), (1109, 18544), (1159, 17744), (2218, 9272), (2318, 8872), (4436, 4636)]