18545900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1$

素因数の和:303

約数の個数: 72

約数和(自身を含む): 43538880

約数和(自身を除く): 24992980

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 43, 50, 76, 86, 95, 100, 172, 190, 215, 227, 380, 430, 454, 475, 817, 860, 908, 950, 1075, 1135, 1634, 1900, 2150, 2270, 3268, 4085, 4300, 4313, 4540, 5675, 8170, 8626, 9761, 11350, 16340, 17252, 19522, 20425, 21565, 22700, 39044, 40850, 43130, 48805, 81700, 86260, 97610, 107825, 185459, 195220, 215650, 244025, 370918, 431300, 488050, 741836, 927295, 976100, 1854590, 3709180, 4636475, 9272950, 18545900]

約数ペア:

[(1, 18545900), (2, 9272950), (4, 4636475), (5, 3709180), (10, 1854590), (19, 976100), (20, 927295), (25, 741836), (38, 488050), (43, 431300), (50, 370918), (76, 244025), (86, 215650), (95, 195220), (100, 185459), (172, 107825), (190, 97610), (215, 86260), (227, 81700), (380, 48805), (430, 43130), (454, 40850), (475, 39044), (817, 22700), (860, 21565), (908, 20425), (950, 19522), (1075, 17252), (1135, 16340), (1634, 11350), (1900, 9761), (2150, 8626), (2270, 8170), (3268, 5675), (4085, 4540), (4300, 4313)]