18940688

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{2221}}^1$

素因数の和:2283

約数の個数: 40

約数和(自身を含む): 40502616

約数和(自身を除く): 21561928

約数列:

[1, 2, 4, 8, 13, 16, 26, 41, 52, 82, 104, 164, 208, 328, 533, 656, 1066, 2132, 2221, 4264, 4442, 8528, 8884, 17768, 28873, 35536, 57746, 91061, 115492, 182122, 230984, 364244, 461968, 728488, 1183793, 1456976, 2367586, 4735172, 9470344, 18940688]

約数ペア:

[(1, 18940688), (2, 9470344), (4, 4735172), (8, 2367586), (13, 1456976), (16, 1183793), (26, 728488), (41, 461968), (52, 364244), (82, 230984), (104, 182122), (164, 115492), (208, 91061), (328, 57746), (533, 35536), (656, 28873), (1066, 17768), (2132, 8884), (2221, 8528), (4264, 4442)]