21149840

素因数分解:

$2^4\times 5^1\times {\mathrm{463}}^1\times {\mathrm{571}}^1$

素因数の和:1047

約数の個数: 40

約数和(自身を含む): 49365888

約数和(自身を除く): 28216048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 463, 571, 926, 1142, 1852, 2284, 2315, 2855, 3704, 4568, 4630, 5710, 7408, 9136, 9260, 11420, 18520, 22840, 37040, 45680, 264373, 528746, 1057492, 1321865, 2114984, 2643730, 4229968, 5287460, 10574920, 21149840]

約数ペア:

[(1, 21149840), (2, 10574920), (4, 5287460), (5, 4229968), (8, 2643730), (10, 2114984), (16, 1321865), (20, 1057492), (40, 528746), (80, 264373), (463, 45680), (571, 37040), (926, 22840), (1142, 18520), (1852, 11420), (2284, 9260), (2315, 9136), (2855, 7408), (3704, 5710), (4568, 4630)]