19881040

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1373}}^1$

素因数の和:1567

約数の個数: 40

約数和(自身を含む): 46512648

約数和(自身を除く): 26631608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1373, 1448, 1810, 2746, 2896, 3620, 5492, 6865, 7240, 10984, 13730, 14480, 21968, 27460, 54920, 109840, 248513, 497026, 994052, 1242565, 1988104, 2485130, 3976208, 4970260, 9940520, 19881040]

約数ペア:

[(1, 19881040), (2, 9940520), (4, 4970260), (5, 3976208), (8, 2485130), (10, 1988104), (16, 1242565), (20, 994052), (40, 497026), (80, 248513), (181, 109840), (362, 54920), (724, 27460), (905, 21968), (1373, 14480), (1448, 13730), (1810, 10984), (2746, 7240), (2896, 6865), (3620, 5492)]