221551240

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{431}}^1$

素因数の和:694

約数の個数: 64

約数和(自身を含む): 509483520

約数和(自身を除く): 287932280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 181, 284, 355, 362, 431, 568, 710, 724, 862, 905, 1420, 1448, 1724, 1810, 2155, 2840, 3448, 3620, 4310, 7240, 8620, 12851, 17240, 25702, 30601, 51404, 61202, 64255, 78011, 102808, 122404, 128510, 153005, 156022, 244808, 257020, 306010, 312044, 390055, 514040, 612020, 624088, 780110, 1224040, 1560220, 3120440, 5538781, 11077562, 22155124, 27693905, 44310248, 55387810, 110775620, 221551240]

約数ペア:

[(1, 221551240), (2, 110775620), (4, 55387810), (5, 44310248), (8, 27693905), (10, 22155124), (20, 11077562), (40, 5538781), (71, 3120440), (142, 1560220), (181, 1224040), (284, 780110), (355, 624088), (362, 612020), (431, 514040), (568, 390055), (710, 312044), (724, 306010), (862, 257020), (905, 244808), (1420, 156022), (1448, 153005), (1724, 128510), (1810, 122404), (2155, 102808), (2840, 78011), (3448, 64255), (3620, 61202), (4310, 51404), (7240, 30601), (8620, 25702), (12851, 17240)]