19994273536

素因数分解:

$2^8\times {\mathrm{61}}^1\times {\mathrm{1280371}}^1$

素因数の和:1280448

約数の個数: 36

約数和(自身を含む): 40564745704

約数和(自身を除く): 20570472168

約数列:

[1, 2, 4, 8, 16, 32, 61, 64, 122, 128, 244, 256, 488, 976, 1952, 3904, 7808, 15616, 1280371, 2560742, 5121484, 10242968, 20485936, 40971872, 78102631, 81943744, 156205262, 163887488, 312410524, 327774976, 624821048, 1249642096, 2499284192, 4998568384, 9997136768, 19994273536]

約数ペア:

[(1, 19994273536), (2, 9997136768), (4, 4998568384), (8, 2499284192), (16, 1249642096), (32, 624821048), (61, 327774976), (64, 312410524), (122, 163887488), (128, 156205262), (244, 81943744), (256, 78102631), (488, 40971872), (976, 20485936), (1952, 10242968), (3904, 5121484), (7808, 2560742), (15616, 1280371)]