164880440

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{9791}}^1$

素因数の和:10223

約数の個数: 32

約数和(自身を含む): 371900160

約数和(自身を除く): 207019720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 2105, 3368, 4210, 8420, 9791, 16840, 19582, 39164, 48955, 78328, 97910, 195820, 391640, 4122011, 8244022, 16488044, 20610055, 32976088, 41220110, 82440220, 164880440]

約数ペア:

[(1, 164880440), (2, 82440220), (4, 41220110), (5, 32976088), (8, 20610055), (10, 16488044), (20, 8244022), (40, 4122011), (421, 391640), (842, 195820), (1684, 97910), (2105, 78328), (3368, 48955), (4210, 39164), (8420, 19582), (9791, 16840)]