20677904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{1117}}^1$

素因数の和:1227

約数の個数: 40

約数和(自身を含む): 43669080

約数和(自身を除く): 22991176

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 89, 104, 178, 208, 356, 712, 1117, 1157, 1424, 2234, 2314, 4468, 4628, 8936, 9256, 14521, 17872, 18512, 29042, 58084, 99413, 116168, 198826, 232336, 397652, 795304, 1292369, 1590608, 2584738, 5169476, 10338952, 20677904]

約数ペア:

[(1, 20677904), (2, 10338952), (4, 5169476), (8, 2584738), (13, 1590608), (16, 1292369), (26, 795304), (52, 397652), (89, 232336), (104, 198826), (178, 116168), (208, 99413), (356, 58084), (712, 29042), (1117, 18512), (1157, 17872), (1424, 14521), (2234, 9256), (2314, 8936), (4468, 4628)]